File: FrameworkFork\System.Runtime.Serialization\System\Runtime\Serialization\CodeGenerator.cs
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Project: src\src\dotnet-svcutil\lib\src\dotnet-svcutil-lib.csproj (dotnet-svcutil-lib)
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
using System;
using System.Collections;
using System.Collections.Generic;
using System.Globalization;
using Microsoft.Xml;
using System.Reflection;
using System.Reflection.Emit;
using System.IO;
using System.Security;
using System.Diagnostics;
 
#if !NET_NATIVE
namespace System.Runtime.Serialization
{
    internal class CodeGenerator
    {
        /// <SecurityNote>
        /// Critical - Static fields are marked SecurityCritical or readonly to prevent
        ///            data from being modified or leaked to other components in appdomain.
        /// </SecurityNote>
        [SecurityCritical]
        private static MethodInfo s_getTypeFromHandle;
        private static MethodInfo GetTypeFromHandle
        {
            /// <SecurityNote>
            /// Critical - fetches the critical getTypeFromHandle field
            /// Safe - get-only properties only needs to be protected for write; initialized in getter if null.
            /// </SecurityNote>
            [SecuritySafeCritical]
            get
            {
                if (s_getTypeFromHandle == null)
                {
                    s_getTypeFromHandle = typeof(Type).GetMethod("GetTypeFromHandle");
                    Debug.Assert(s_getTypeFromHandle != null);
                }
                return s_getTypeFromHandle;
            }
        }
 
        /// <SecurityNote>
        /// Critical - Static fields are marked SecurityCritical or readonly to prevent
        ///            data from being modified or leaked to other components in appdomain.
        /// </SecurityNote>
        [SecurityCritical]
        private static MethodInfo s_objectEquals;
        private static MethodInfo ObjectEquals
        {
            /// <SecurityNote>
            /// Critical - fetches the critical objectEquals field
            /// Safe - get-only properties only needs to be protected for write; initialized in getter if null.
            /// </SecurityNote>
            [SecuritySafeCritical]
            get
            {
                if (s_objectEquals == null)
                {
                    s_objectEquals = Globals.TypeOfObject.GetMethod("Equals", BindingFlags.Public | BindingFlags.Static);
                    Debug.Assert(s_objectEquals != null);
                }
                return s_objectEquals;
            }
        }
        /// <SecurityNote>
        /// Critical - Static fields are marked SecurityCritical or readonly to prevent
        ///            data from being modified or leaked to other components in appdomain.
        /// </SecurityNote>
        [SecurityCritical]
        private static MethodInfo s_arraySetValue;
        private static MethodInfo ArraySetValue
        {
            /// <SecurityNote>
            /// Critical - fetches the critical arraySetValue field
            /// Safe - get-only properties only needs to be protected for write; initialized in getter if null.
            /// </SecurityNote>
            [SecuritySafeCritical]
            get
            {
                if (s_arraySetValue == null)
                {
                    s_arraySetValue = typeof(Array).GetMethod("SetValue", new Type[] { typeof(object), typeof(int) });
                    Debug.Assert(s_arraySetValue != null);
                }
                return s_arraySetValue;
            }
        }
 
#if !NET_NATIVE
        [SecurityCritical]
        private static MethodInfo s_objectToString;
        private static MethodInfo ObjectToString
        {
            [SecuritySafeCritical]
            get
            {
                if (s_objectToString == null)
                {
                    s_objectToString = typeof(object).GetMethod("ToString", Array.Empty<Type>());
                    Debug.Assert(s_objectToString != null);
                }
                return s_objectToString;
            }
        }
 
        private static MethodInfo s_stringFormat;
        private static MethodInfo StringFormat
        {
            [SecuritySafeCritical]
            get
            {
                if (s_stringFormat == null)
                {
                    s_stringFormat = typeof(string).GetMethod("Format", new Type[] { typeof(string), typeof(object[]) });
                    Debug.Assert(s_stringFormat != null);
                }
                return s_stringFormat;
            }
        }
#endif
 
        private Type _delegateType;
 
#if USE_REFEMIT
        AssemblyBuilder assemblyBuilder;
        ModuleBuilder moduleBuilder;
        TypeBuilder typeBuilder;
        static int typeCounter;
        MethodBuilder methodBuilder;
#else
        /// <SecurityNote>
        /// Critical - Static fields are marked SecurityCritical or readonly to prevent
        ///            data from being modified or leaked to other components in appdomain.
        /// </SecurityNote>
        [SecurityCritical]
        private static Module s_serializationModule;
        private static Module SerializationModule
        {
            /// <SecurityNote>
            /// Critical - fetches the critical serializationModule field
            /// Safe - get-only properties only needs to be protected for write; initialized in getter if null.
            /// </SecurityNote>
            [SecuritySafeCritical]
            get
            {
                if (s_serializationModule == null)
                {
                    s_serializationModule = typeof(CodeGenerator).GetTypeInfo().Module;   // could to be replaced by different dll that has SkipVerification set to false
                }
                return s_serializationModule;
            }
        }
        private DynamicMethod _dynamicMethod;
#endif
 
        private ILGenerator _ilGen;
        private List<ArgBuilder> _argList;
        private Stack<object> _blockStack;
        private Label _methodEndLabel;
 
        private Dictionary<LocalBuilder, string> _localNames = new Dictionary<LocalBuilder, string>();
 
        private enum CodeGenTrace { None, Save, Tron };
        private CodeGenTrace _codeGenTrace;
 
#if !NET_NATIVE
        private LocalBuilder _stringFormatArray;
#endif
 
        internal CodeGenerator()
        {
            //Defaulting to None as thats the default value in WCF
            _codeGenTrace = CodeGenTrace.None;
        }
 
#if !USE_REFEMIT
        internal void BeginMethod(DynamicMethod dynamicMethod, Type delegateType, string methodName, Type[] argTypes, bool allowPrivateMemberAccess)
        {
            _dynamicMethod = dynamicMethod;
            _ilGen = _dynamicMethod.GetILGenerator();
            _delegateType = delegateType;
 
            InitILGeneration(methodName, argTypes);
        }
#endif
 
        internal void BeginMethod(string methodName, Type delegateType, bool allowPrivateMemberAccess)
        {
            MethodInfo signature = delegateType.GetMethod("Invoke");
            ParameterInfo[] parameters = signature.GetParameters();
            Type[] paramTypes = new Type[parameters.Length];
            for (int i = 0; i < parameters.Length; i++)
                paramTypes[i] = parameters[i].ParameterType;
            BeginMethod(signature.ReturnType, methodName, paramTypes, allowPrivateMemberAccess);
            _delegateType = delegateType;
        }
        [SecuritySafeCritical]
 
        private void BeginMethod(Type returnType, string methodName, Type[] argTypes, bool allowPrivateMemberAccess)
        {
#if USE_REFEMIT
            string typeName = "Type" + (typeCounter++);
            InitAssemblyBuilder(typeName + "." + methodName);
            this.typeBuilder = moduleBuilder.DefineType(typeName, TypeAttributes.Public);
            this.methodBuilder = typeBuilder.DefineMethod(methodName, MethodAttributes.Public|MethodAttributes.Static, returnType, argTypes);
            this.ilGen = this.methodBuilder.GetILGenerator();
#else
            _dynamicMethod = new DynamicMethod(methodName, returnType, argTypes, SerializationModule, allowPrivateMemberAccess);
 
            _ilGen = _dynamicMethod.GetILGenerator();
#endif
 
            InitILGeneration(methodName, argTypes);
        }
 
        private void InitILGeneration(string methodName, Type[] argTypes)
        {
            _methodEndLabel = _ilGen.DefineLabel();
            _blockStack = new Stack<object>();
            _argList = new List<ArgBuilder>();
            for (int i = 0; i < argTypes.Length; i++)
                _argList.Add(new ArgBuilder(i, argTypes[i]));
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceLabel("Begin method " + methodName + " {");
        }
 
        internal Delegate EndMethod()
        {
            MarkLabel(_methodEndLabel);
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceLabel("} End method");
            Ret();
 
            Delegate retVal = null;
#if USE_REFEMIT
            Type type = typeBuilder.CreateType();
            MethodInfo method = type.GetMethod(methodBuilder.Name);
            retVal = Delegate.CreateDelegate(delegateType, method);
            methodBuilder = null;
#else
            retVal = _dynamicMethod.CreateDelegate(_delegateType);
            _dynamicMethod = null;
#endif
            _delegateType = null;
 
            _ilGen = null;
            _blockStack = null;
            _argList = null;
            return retVal;
        }
 
        internal MethodInfo CurrentMethod
        {
            get
            {
#if USE_REFEMIT
                return methodBuilder;
#else
                return _dynamicMethod;
#endif
            }
        }
 
        internal ArgBuilder GetArg(int index)
        {
            return (ArgBuilder)_argList[index];
        }
 
        internal Type GetVariableType(object var)
        {
            if (var is ArgBuilder)
                return ((ArgBuilder)var).ArgType;
            else if (var is LocalBuilder)
                return ((LocalBuilder)var).LocalType;
            else
                return var.GetType();
        }
 
        internal LocalBuilder DeclareLocal(Type type, string name, object initialValue)
        {
            LocalBuilder local = DeclareLocal(type, name);
            Load(initialValue);
            Store(local);
            return local;
        }
 
        internal LocalBuilder DeclareLocal(Type type, string name)
        {
            return DeclareLocal(type, name, false);
        }
 
        internal LocalBuilder DeclareLocal(Type type, string name, bool isPinned)
        {
            LocalBuilder local = _ilGen.DeclareLocal(type, isPinned);
            if (_codeGenTrace != CodeGenTrace.None)
            {
                _localNames[local] = name;
                EmitSourceComment("Declare local '" + name + "' of type " + type);
            }
            return local;
        }
 
        internal void Set(LocalBuilder local, object value)
        {
            Load(value);
            Store(local);
        }
 
        internal object For(LocalBuilder local, object start, object end)
        {
            ForState forState = new ForState(local, DefineLabel(), DefineLabel(), end);
            if (forState.Index != null)
            {
                Load(start);
                Stloc(forState.Index);
                Br(forState.TestLabel);
            }
            MarkLabel(forState.BeginLabel);
            _blockStack.Push(forState);
            return forState;
        }
 
        internal void EndFor()
        {
            object stackTop = _blockStack.Pop();
            ForState forState = stackTop as ForState;
            if (forState == null)
                ThrowMismatchException(stackTop);
 
            if (forState.Index != null)
            {
                Ldloc(forState.Index);
                Ldc(1);
                Add();
                Stloc(forState.Index);
                MarkLabel(forState.TestLabel);
                Ldloc(forState.Index);
                Load(forState.End);
                if (GetVariableType(forState.End).IsArray)
                    Ldlen();
                Blt(forState.BeginLabel);
            }
            else
                Br(forState.BeginLabel);
            if (forState.RequiresEndLabel)
                MarkLabel(forState.EndLabel);
        }
 
        internal void Break(object forState)
        {
            InternalBreakFor(forState, OpCodes.Br);
        }
 
        internal void IfFalseBreak(object forState)
        {
            InternalBreakFor(forState, OpCodes.Brfalse);
        }
 
        internal void InternalBreakFor(object userForState, OpCode branchInstruction)
        {
            foreach (object block in _blockStack)
            {
                ForState forState = block as ForState;
                if (forState != null && (object)forState == userForState)
                {
                    if (!forState.RequiresEndLabel)
                    {
                        forState.EndLabel = DefineLabel();
                        forState.RequiresEndLabel = true;
                    }
                    if (_codeGenTrace != CodeGenTrace.None)
                        EmitSourceInstruction(branchInstruction + " " + forState.EndLabel.GetHashCode());
                    _ilGen.Emit(branchInstruction, forState.EndLabel);
                    break;
                }
            }
        }
 
        internal void ForEach(LocalBuilder local, Type elementType, Type enumeratorType,
            LocalBuilder enumerator, MethodInfo getCurrentMethod)
        {
            ForState forState = new ForState(local, DefineLabel(), DefineLabel(), enumerator);
 
            Br(forState.TestLabel);
            MarkLabel(forState.BeginLabel);
 
            Call(enumerator, getCurrentMethod);
 
            ConvertValue(elementType, GetVariableType(local));
            Stloc(local);
            _blockStack.Push(forState);
        }
 
        internal void EndForEach(MethodInfo moveNextMethod)
        {
            object stackTop = _blockStack.Pop();
            ForState forState = stackTop as ForState;
            if (forState == null)
                ThrowMismatchException(stackTop);
 
            MarkLabel(forState.TestLabel);
 
            object enumerator = forState.End;
            Call(enumerator, moveNextMethod);
 
 
            Brtrue(forState.BeginLabel);
            if (forState.RequiresEndLabel)
                MarkLabel(forState.EndLabel);
        }
 
        internal void IfNotDefaultValue(object value)
        {
            Type type = GetVariableType(value);
            TypeCode typeCode = type.GetTypeCode();
            if ((typeCode == TypeCode.Object && type.GetTypeInfo().IsValueType) ||
                typeCode == TypeCode.DateTime || typeCode == TypeCode.Decimal)
            {
                LoadDefaultValue(type);
                ConvertValue(type, Globals.TypeOfObject);
                Load(value);
                ConvertValue(type, Globals.TypeOfObject);
                Call(ObjectEquals);
                IfNot();
            }
            else
            {
                LoadDefaultValue(type);
                Load(value);
                If(Cmp.NotEqualTo);
            }
        }
 
        internal void If()
        {
            InternalIf(false);
        }
 
        internal void IfNot()
        {
            InternalIf(true);
        }
 
        private OpCode GetBranchCode(Cmp cmp)
        {
            switch (cmp)
            {
                case Cmp.LessThan:
                    return OpCodes.Bge;
                case Cmp.EqualTo:
                    return OpCodes.Bne_Un;
                case Cmp.LessThanOrEqualTo:
                    return OpCodes.Bgt;
                case Cmp.GreaterThan:
                    return OpCodes.Ble;
                case Cmp.NotEqualTo:
                    return OpCodes.Beq;
                default:
                    DiagnosticUtility.DebugAssert(cmp == Cmp.GreaterThanOrEqualTo, "Unexpected cmp");
                    return OpCodes.Blt;
            }
        }
 
        internal void If(Cmp cmpOp)
        {
            IfState ifState = new IfState();
            ifState.EndIf = DefineLabel();
            ifState.ElseBegin = DefineLabel();
            _ilGen.Emit(GetBranchCode(cmpOp), ifState.ElseBegin);
            _blockStack.Push(ifState);
        }
 
 
        internal void If(object value1, Cmp cmpOp, object value2)
        {
            Load(value1);
            Load(value2);
            If(cmpOp);
        }
        internal void Else()
        {
            IfState ifState = PopIfState();
            Br(ifState.EndIf);
            MarkLabel(ifState.ElseBegin);
 
            ifState.ElseBegin = ifState.EndIf;
            _blockStack.Push(ifState);
        }
 
        internal void ElseIf(object value1, Cmp cmpOp, object value2)
        {
            IfState ifState = (IfState)_blockStack.Pop();
            Br(ifState.EndIf);
            MarkLabel(ifState.ElseBegin);
 
            Load(value1);
            Load(value2);
            ifState.ElseBegin = DefineLabel();
 
            _ilGen.Emit(GetBranchCode(cmpOp), ifState.ElseBegin);
            _blockStack.Push(ifState);
        }
 
 
        internal void EndIf()
        {
            IfState ifState = PopIfState();
            if (!ifState.ElseBegin.Equals(ifState.EndIf))
                MarkLabel(ifState.ElseBegin);
            MarkLabel(ifState.EndIf);
        }
 
        internal void VerifyParameterCount(MethodInfo methodInfo, int expectedCount)
        {
            if (methodInfo.GetParameters().Length != expectedCount)
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(string.Format(SRSerialization.ParameterCountMismatch, methodInfo.Name, methodInfo.GetParameters().Length, expectedCount)));
        }
 
        internal void Call(object thisObj, MethodInfo methodInfo)
        {
            VerifyParameterCount(methodInfo, 0);
            LoadThis(thisObj, methodInfo);
            Call(methodInfo);
        }
 
        internal void Call(object thisObj, MethodInfo methodInfo, object param1)
        {
            VerifyParameterCount(methodInfo, 1);
            LoadThis(thisObj, methodInfo);
            LoadParam(param1, 1, methodInfo);
            Call(methodInfo);
        }
 
        internal void Call(object thisObj, MethodInfo methodInfo, object param1, object param2)
        {
            VerifyParameterCount(methodInfo, 2);
            LoadThis(thisObj, methodInfo);
            LoadParam(param1, 1, methodInfo);
            LoadParam(param2, 2, methodInfo);
            Call(methodInfo);
        }
 
        internal void Call(object thisObj, MethodInfo methodInfo, object param1, object param2, object param3)
        {
            VerifyParameterCount(methodInfo, 3);
            LoadThis(thisObj, methodInfo);
            LoadParam(param1, 1, methodInfo);
            LoadParam(param2, 2, methodInfo);
            LoadParam(param3, 3, methodInfo);
            Call(methodInfo);
        }
 
        internal void Call(object thisObj, MethodInfo methodInfo, object param1, object param2, object param3, object param4)
        {
            VerifyParameterCount(methodInfo, 4);
            LoadThis(thisObj, methodInfo);
            LoadParam(param1, 1, methodInfo);
            LoadParam(param2, 2, methodInfo);
            LoadParam(param3, 3, methodInfo);
            LoadParam(param4, 4, methodInfo);
            Call(methodInfo);
        }
 
        internal void Call(object thisObj, MethodInfo methodInfo, object param1, object param2, object param3, object param4, object param5)
        {
            VerifyParameterCount(methodInfo, 5);
            LoadThis(thisObj, methodInfo);
            LoadParam(param1, 1, methodInfo);
            LoadParam(param2, 2, methodInfo);
            LoadParam(param3, 3, methodInfo);
            LoadParam(param4, 4, methodInfo);
            LoadParam(param5, 5, methodInfo);
            Call(methodInfo);
        }
 
        internal void Call(object thisObj, MethodInfo methodInfo, object param1, object param2, object param3, object param4, object param5, object param6)
        {
            VerifyParameterCount(methodInfo, 6);
            LoadThis(thisObj, methodInfo);
            LoadParam(param1, 1, methodInfo);
            LoadParam(param2, 2, methodInfo);
            LoadParam(param3, 3, methodInfo);
            LoadParam(param4, 4, methodInfo);
            LoadParam(param5, 5, methodInfo);
            LoadParam(param6, 6, methodInfo);
            Call(methodInfo);
        }
 
        internal void Call(MethodInfo methodInfo)
        {
            if (methodInfo.IsVirtual && !methodInfo.DeclaringType.GetTypeInfo().IsValueType)
            {
                if (_codeGenTrace != CodeGenTrace.None)
                    EmitSourceInstruction("Callvirt " + methodInfo.ToString() + " on type " + methodInfo.DeclaringType.ToString());
                _ilGen.Emit(OpCodes.Callvirt, methodInfo);
            }
            else if (methodInfo.IsStatic)
            {
                if (_codeGenTrace != CodeGenTrace.None)
                    EmitSourceInstruction("Static Call " + methodInfo.ToString() + " on type " + methodInfo.DeclaringType.ToString());
                _ilGen.Emit(OpCodes.Call, methodInfo);
            }
            else
            {
                if (_codeGenTrace != CodeGenTrace.None)
                    EmitSourceInstruction("Call " + methodInfo.ToString() + " on type " + methodInfo.DeclaringType.ToString());
                _ilGen.Emit(OpCodes.Call, methodInfo);
            }
        }
 
        internal void Call(ConstructorInfo ctor)
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Call " + ctor.ToString() + " on type " + ctor.DeclaringType.ToString());
            _ilGen.Emit(OpCodes.Call, ctor);
        }
 
        internal void New(ConstructorInfo constructorInfo)
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Newobj " + constructorInfo.ToString() + " on type " + constructorInfo.DeclaringType.ToString());
            _ilGen.Emit(OpCodes.Newobj, constructorInfo);
        }
 
 
        internal void InitObj(Type valueType)
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Initobj " + valueType);
            _ilGen.Emit(OpCodes.Initobj, valueType);
        }
 
        internal void NewArray(Type elementType, object len)
        {
            Load(len);
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Newarr " + elementType);
            _ilGen.Emit(OpCodes.Newarr, elementType);
        }
 
        internal void LoadArrayElement(object obj, object arrayIndex)
        {
            Type objType = GetVariableType(obj).GetElementType();
            Load(obj);
            Load(arrayIndex);
            if (IsStruct(objType))
            {
                Ldelema(objType);
                Ldobj(objType);
            }
            else
                Ldelem(objType);
        }
 
        internal void StoreArrayElement(object obj, object arrayIndex, object value)
        {
            Type arrayType = GetVariableType(obj);
            if (arrayType == Globals.TypeOfArray)
            {
                Call(obj, ArraySetValue, value, arrayIndex);
            }
            else
            {
                Type objType = arrayType.GetElementType();
                Load(obj);
                Load(arrayIndex);
                if (IsStruct(objType))
                    Ldelema(objType);
                Load(value);
                ConvertValue(GetVariableType(value), objType);
                if (IsStruct(objType))
                    Stobj(objType);
                else
                    Stelem(objType);
            }
        }
 
        private static bool IsStruct(Type objType)
        {
            return objType.GetTypeInfo().IsValueType && !objType.GetTypeInfo().IsPrimitive;
        }
 
        internal Type LoadMember(MemberInfo memberInfo)
        {
            Type memberType = null;
            if (memberInfo is FieldInfo)
            {
                FieldInfo fieldInfo = (FieldInfo)memberInfo;
                memberType = fieldInfo.FieldType;
                if (fieldInfo.IsStatic)
                {
                    if (_codeGenTrace != CodeGenTrace.None)
                        EmitSourceInstruction("Ldsfld " + fieldInfo + " on type " + fieldInfo.DeclaringType);
                    _ilGen.Emit(OpCodes.Ldsfld, fieldInfo);
                }
                else
                {
                    if (_codeGenTrace != CodeGenTrace.None)
                        EmitSourceInstruction("Ldfld " + fieldInfo + " on type " + fieldInfo.DeclaringType);
                    _ilGen.Emit(OpCodes.Ldfld, fieldInfo);
                }
            }
            else if (memberInfo is PropertyInfo)
            {
                PropertyInfo property = memberInfo as PropertyInfo;
                memberType = property.PropertyType;
                if (property != null)
                {
                    MethodInfo getMethod = property.GetMethod;
                    if (getMethod == null)
                        throw /*System.Runtime.Serialization.*/DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(string.Format(SRSerialization.NoGetMethodForProperty, property.DeclaringType, property)));
                    Call(getMethod);
                }
            }
            else if (memberInfo is MethodInfo)
            {
                MethodInfo method = (MethodInfo)memberInfo;
                memberType = method.ReturnType;
                Call(method);
            }
            else
                throw /*System.Runtime.Serialization.*/DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(string.Format(SRSerialization.CannotLoadMemberType, "Unknown", memberInfo.DeclaringType, memberInfo.Name)));
 
            EmitStackTop(memberType);
            return memberType;
        }
 
        internal void StoreMember(MemberInfo memberInfo)
        {
            if (memberInfo is FieldInfo)
            {
                FieldInfo fieldInfo = (FieldInfo)memberInfo;
                if (fieldInfo.IsStatic)
                {
                    if (_codeGenTrace != CodeGenTrace.None)
                        EmitSourceInstruction("Stsfld " + fieldInfo + " on type " + fieldInfo.DeclaringType);
                    _ilGen.Emit(OpCodes.Stsfld, fieldInfo);
                }
                else
                {
                    if (_codeGenTrace != CodeGenTrace.None)
                        EmitSourceInstruction("Stfld " + fieldInfo + " on type " + fieldInfo.DeclaringType);
                    _ilGen.Emit(OpCodes.Stfld, fieldInfo);
                }
            }
            else if (memberInfo is PropertyInfo)
            {
                PropertyInfo property = memberInfo as PropertyInfo;
                if (property != null)
                {
                    MethodInfo setMethod = property.SetMethod;
                    if (setMethod == null)
                        throw /*System.Runtime.Serialization.*/DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(string.Format(SRSerialization.NoSetMethodForProperty, property.DeclaringType, property)));
                    Call(setMethod);
                }
            }
            else if (memberInfo is MethodInfo)
                Call((MethodInfo)memberInfo);
            else
                throw /*System.Runtime.Serialization.*/DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(string.Format(SRSerialization.CannotLoadMemberType, "Unknown")));
        }
 
        internal void LoadDefaultValue(Type type)
        {
            if (type.GetTypeInfo().IsValueType)
            {
                switch (type.GetTypeCode())
                {
                    case TypeCode.Boolean:
                        Ldc(false);
                        break;
                    case TypeCode.Char:
                    case TypeCode.SByte:
                    case TypeCode.Byte:
                    case TypeCode.Int16:
                    case TypeCode.UInt16:
                    case TypeCode.Int32:
                    case TypeCode.UInt32:
                        Ldc(0);
                        break;
                    case TypeCode.Int64:
                    case TypeCode.UInt64:
                        Ldc(0L);
                        break;
                    case TypeCode.Single:
                        Ldc(0.0F);
                        break;
                    case TypeCode.Double:
                        Ldc(0.0);
                        break;
                    case TypeCode.Decimal:
                    case TypeCode.DateTime:
                    default:
                        LocalBuilder zero = DeclareLocal(type, "zero");
                        LoadAddress(zero);
                        InitObj(type);
                        Load(zero);
                        break;
                }
            }
            else
                Load(null);
        }
 
        internal void Load(object obj)
        {
            if (obj == null)
            {
                if (_codeGenTrace != CodeGenTrace.None)
                    EmitSourceInstruction("Ldnull");
                _ilGen.Emit(OpCodes.Ldnull);
            }
            else if (obj is ArgBuilder)
                Ldarg((ArgBuilder)obj);
            else if (obj is LocalBuilder)
                Ldloc((LocalBuilder)obj);
            else
                Ldc(obj);
        }
 
        internal void Store(object var)
        {
            if (var is ArgBuilder)
                Starg((ArgBuilder)var);
            else if (var is LocalBuilder)
                Stloc((LocalBuilder)var);
            else
            {
                DiagnosticUtility.DebugAssert("Data can only be stored into ArgBuilder or LocalBuilder.");
                throw /*System.Runtime.Serialization.*/DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(string.Format(SRSerialization.CanOnlyStoreIntoArgOrLocGot0, DataContract.GetClrTypeFullName(var.GetType()))));
            }
        }
 
        internal void Dec(object var)
        {
            Load(var);
            Load(1);
            Subtract();
            Store(var);
        }
 
        internal void LoadAddress(object obj)
        {
            if (obj is ArgBuilder)
                LdargAddress((ArgBuilder)obj);
            else if (obj is LocalBuilder)
                LdlocAddress((LocalBuilder)obj);
            else
                Load(obj);
        }
 
 
        internal void ConvertAddress(Type source, Type target)
        {
            InternalConvert(source, target, true);
        }
 
        internal void ConvertValue(Type source, Type target)
        {
            InternalConvert(source, target, false);
        }
 
 
        internal void Castclass(Type target)
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Castclass " + target);
            _ilGen.Emit(OpCodes.Castclass, target);
        }
 
        internal void Box(Type type)
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Box " + type);
            _ilGen.Emit(OpCodes.Box, type);
        }
 
        internal void Unbox(Type type)
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Unbox " + type);
            _ilGen.Emit(OpCodes.Unbox, type);
        }
 
        private OpCode GetLdindOpCode(TypeCode typeCode)
        {
            switch (typeCode)
            {
                case TypeCode.Boolean:
                    return OpCodes.Ldind_I1; // TypeCode.Boolean:
                case TypeCode.Char:
                    return OpCodes.Ldind_I2; // TypeCode.Char:
                case TypeCode.SByte:
                    return OpCodes.Ldind_I1; // TypeCode.SByte:
                case TypeCode.Byte:
                    return OpCodes.Ldind_U1; // TypeCode.Byte:
                case TypeCode.Int16:
                    return OpCodes.Ldind_I2; // TypeCode.Int16:
                case TypeCode.UInt16:
                    return OpCodes.Ldind_U2; // TypeCode.UInt16:
                case TypeCode.Int32:
                    return OpCodes.Ldind_I4; // TypeCode.Int32:
                case TypeCode.UInt32:
                    return OpCodes.Ldind_U4; // TypeCode.UInt32:
                case TypeCode.Int64:
                    return OpCodes.Ldind_I8; // TypeCode.Int64:
                case TypeCode.UInt64:
                    return OpCodes.Ldind_I8; // TypeCode.UInt64:
                case TypeCode.Single:
                    return OpCodes.Ldind_R4; // TypeCode.Single:
                case TypeCode.Double:
                    return OpCodes.Ldind_R8; // TypeCode.Double:
                case TypeCode.String:
                    return OpCodes.Ldind_Ref; // TypeCode.String:
                default:
                    return OpCodes.Nop;
            }
        }
 
        internal void Ldobj(Type type)
        {
            OpCode opCode = GetLdindOpCode(type.GetTypeCode());
            if (!opCode.Equals(OpCodes.Nop))
            {
                if (_codeGenTrace != CodeGenTrace.None)
                    EmitSourceInstruction(opCode.ToString());
                _ilGen.Emit(opCode);
            }
            else
            {
                if (_codeGenTrace != CodeGenTrace.None)
                    EmitSourceInstruction("Ldobj " + type);
                _ilGen.Emit(OpCodes.Ldobj, type);
            }
        }
 
        internal void Stobj(Type type)
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Stobj " + type);
            _ilGen.Emit(OpCodes.Stobj, type);
        }
 
 
        internal void Ceq()
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Ceq");
            _ilGen.Emit(OpCodes.Ceq);
        }
 
        internal void Throw()
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Throw");
            _ilGen.Emit(OpCodes.Throw);
        }
 
        internal void Ldtoken(Type t)
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Ldtoken " + t);
            _ilGen.Emit(OpCodes.Ldtoken, t);
        }
 
        internal void Ldc(object o)
        {
            Type valueType = o.GetType();
            if (o is Type)
            {
                Ldtoken((Type)o);
                Call(GetTypeFromHandle);
            }
            else if (valueType.GetTypeInfo().IsEnum)
            {
                if (_codeGenTrace != CodeGenTrace.None)
                    EmitSourceComment("Ldc " + o.GetType() + "." + o);
                Ldc(Convert.ChangeType(o, Enum.GetUnderlyingType(valueType), null));
            }
            else
            {
                switch (valueType.GetTypeCode())
                {
                    case TypeCode.Boolean:
                        Ldc((bool)o);
                        break;
                    case TypeCode.Char:
                        DiagnosticUtility.DebugAssert("Char is not a valid schema primitive and should be treated as int in DataContract");
                        throw /*System.Runtime.Serialization.*/DiagnosticUtility.ExceptionUtility.ThrowHelperError(new NotSupportedException(string.Format(SRSerialization.CharIsInvalidPrimitive)));
                    case TypeCode.SByte:
                    case TypeCode.Byte:
                    case TypeCode.Int16:
                    case TypeCode.UInt16:
                        Ldc(Convert.ToInt32(o, CultureInfo.InvariantCulture));
                        break;
                    case TypeCode.Int32:
                        Ldc((int)o);
                        break;
                    case TypeCode.UInt32:
                        Ldc((int)(uint)o);
                        break;
                    case TypeCode.UInt64:
                        Ldc((long)(ulong)o);
                        break;
                    case TypeCode.Int64:
                        Ldc((long)o);
                        break;
                    case TypeCode.Single:
                        Ldc((float)o);
                        break;
                    case TypeCode.Double:
                        Ldc((double)o);
                        break;
                    case TypeCode.String:
                        Ldstr((string)o);
                        break;
                    case TypeCode.Object:
                    case TypeCode.Decimal:
                    case TypeCode.DateTime:
                    case TypeCode.Empty:
                    default:
                        throw /*System.Runtime.Serialization.*/DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(string.Format(SRSerialization.UnknownConstantType, DataContract.GetClrTypeFullName(valueType))));
                }
            }
        }
 
        internal void Ldc(bool boolVar)
        {
            if (boolVar)
            {
                if (_codeGenTrace != CodeGenTrace.None)
                    EmitSourceInstruction("Ldc.i4 1");
                _ilGen.Emit(OpCodes.Ldc_I4_1);
            }
            else
            {
                if (_codeGenTrace != CodeGenTrace.None)
                    EmitSourceInstruction("Ldc.i4 0");
                _ilGen.Emit(OpCodes.Ldc_I4_0);
            }
        }
 
        internal void Ldc(int intVar)
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Ldc.i4 " + intVar);
            switch (intVar)
            {
                case -1:
                    _ilGen.Emit(OpCodes.Ldc_I4_M1);
                    break;
                case 0:
                    _ilGen.Emit(OpCodes.Ldc_I4_0);
                    break;
                case 1:
                    _ilGen.Emit(OpCodes.Ldc_I4_1);
                    break;
                case 2:
                    _ilGen.Emit(OpCodes.Ldc_I4_2);
                    break;
                case 3:
                    _ilGen.Emit(OpCodes.Ldc_I4_3);
                    break;
                case 4:
                    _ilGen.Emit(OpCodes.Ldc_I4_4);
                    break;
                case 5:
                    _ilGen.Emit(OpCodes.Ldc_I4_5);
                    break;
                case 6:
                    _ilGen.Emit(OpCodes.Ldc_I4_6);
                    break;
                case 7:
                    _ilGen.Emit(OpCodes.Ldc_I4_7);
                    break;
                case 8:
                    _ilGen.Emit(OpCodes.Ldc_I4_8);
                    break;
                default:
                    _ilGen.Emit(OpCodes.Ldc_I4, intVar);
                    break;
            }
        }
 
        internal void Ldc(long l)
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Ldc.i8 " + l);
            _ilGen.Emit(OpCodes.Ldc_I8, l);
        }
 
        internal void Ldc(float f)
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Ldc.r4 " + f);
            _ilGen.Emit(OpCodes.Ldc_R4, f);
        }
 
        internal void Ldc(double d)
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Ldc.r8 " + d);
            _ilGen.Emit(OpCodes.Ldc_R8, d);
        }
 
        internal void Ldstr(string strVar)
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Ldstr " + strVar);
            _ilGen.Emit(OpCodes.Ldstr, strVar);
        }
 
        internal void LdlocAddress(LocalBuilder localBuilder)
        {
            if (localBuilder.LocalType.GetTypeInfo().IsValueType)
                Ldloca(localBuilder);
            else
                Ldloc(localBuilder);
        }
 
        internal void Ldloc(LocalBuilder localBuilder)
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Ldloc " + _localNames[localBuilder]);
            _ilGen.Emit(OpCodes.Ldloc, localBuilder);
            EmitStackTop(localBuilder.LocalType);
        }
 
        internal void Stloc(LocalBuilder local)
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Stloc " + _localNames[local]);
            EmitStackTop(local.LocalType);
            _ilGen.Emit(OpCodes.Stloc, local);
        }
 
 
        internal void Ldloca(LocalBuilder localBuilder)
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Ldloca " + _localNames[localBuilder]);
            _ilGen.Emit(OpCodes.Ldloca, localBuilder);
            EmitStackTop(localBuilder.LocalType);
        }
 
        internal void LdargAddress(ArgBuilder argBuilder)
        {
            if (argBuilder.ArgType.GetTypeInfo().IsValueType)
                Ldarga(argBuilder);
            else
                Ldarg(argBuilder);
        }
 
        internal void Ldarg(ArgBuilder arg)
        {
            Ldarg(arg.Index);
        }
 
        internal void Starg(ArgBuilder arg)
        {
            Starg(arg.Index);
        }
 
        internal void Ldarg(int slot)
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Ldarg " + slot);
            switch (slot)
            {
                case 0:
                    _ilGen.Emit(OpCodes.Ldarg_0);
                    break;
                case 1:
                    _ilGen.Emit(OpCodes.Ldarg_1);
                    break;
                case 2:
                    _ilGen.Emit(OpCodes.Ldarg_2);
                    break;
                case 3:
                    _ilGen.Emit(OpCodes.Ldarg_3);
                    break;
                default:
                    if (slot <= 255)
                        _ilGen.Emit(OpCodes.Ldarg_S, slot);
                    else
                        _ilGen.Emit(OpCodes.Ldarg, slot);
                    break;
            }
        }
 
        internal void Starg(int slot)
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Starg " + slot);
            if (slot <= 255)
                _ilGen.Emit(OpCodes.Starg_S, slot);
            else
                _ilGen.Emit(OpCodes.Starg, slot);
        }
 
        internal void Ldarga(ArgBuilder argBuilder)
        {
            Ldarga(argBuilder.Index);
        }
 
        internal void Ldarga(int slot)
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Ldarga " + slot);
            if (slot <= 255)
                _ilGen.Emit(OpCodes.Ldarga_S, slot);
            else
                _ilGen.Emit(OpCodes.Ldarga, slot);
        }
 
        internal void Ldlen()
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Ldlen");
            _ilGen.Emit(OpCodes.Ldlen);
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Conv.i4");
            _ilGen.Emit(OpCodes.Conv_I4);
        }
 
        private OpCode GetLdelemOpCode(TypeCode typeCode)
        {
            switch (typeCode)
            {
                case TypeCode.Object:
                    return OpCodes.Ldelem_Ref;// TypeCode.Object:
                case TypeCode.Boolean:
                    return OpCodes.Ldelem_I1;// TypeCode.Boolean:
                case TypeCode.Char:
                    return OpCodes.Ldelem_I2;// TypeCode.Char:
                case TypeCode.SByte:
                    return OpCodes.Ldelem_I1;// TypeCode.SByte:
                case TypeCode.Byte:
                    return OpCodes.Ldelem_U1;// TypeCode.Byte:
                case TypeCode.Int16:
                    return OpCodes.Ldelem_I2;// TypeCode.Int16:
                case TypeCode.UInt16:
                    return OpCodes.Ldelem_U2;// TypeCode.UInt16:
                case TypeCode.Int32:
                    return OpCodes.Ldelem_I4;// TypeCode.Int32:
                case TypeCode.UInt32:
                    return OpCodes.Ldelem_U4;// TypeCode.UInt32:
                case TypeCode.Int64:
                    return OpCodes.Ldelem_I8;// TypeCode.Int64:
                case TypeCode.UInt64:
                    return OpCodes.Ldelem_I8;// TypeCode.UInt64:
                case TypeCode.Single:
                    return OpCodes.Ldelem_R4;// TypeCode.Single:
                case TypeCode.Double:
                    return OpCodes.Ldelem_R8;// TypeCode.Double:
                case TypeCode.String:
                    return OpCodes.Ldelem_Ref;// TypeCode.String:
                default:
                    return OpCodes.Nop;
            }
        }
 
        internal void Ldelem(Type arrayElementType)
        {
            if (arrayElementType.GetTypeInfo().IsEnum)
            {
                Ldelem(Enum.GetUnderlyingType(arrayElementType));
            }
            else
            {
                OpCode opCode = GetLdelemOpCode(arrayElementType.GetTypeCode());
                if (opCode.Equals(OpCodes.Nop))
                    throw /*System.Runtime.Serialization.*/DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(string.Format(SRSerialization.ArrayTypeIsNotSupported, DataContract.GetClrTypeFullName(arrayElementType))));
                if (_codeGenTrace != CodeGenTrace.None)
                    EmitSourceInstruction(opCode.ToString());
                _ilGen.Emit(opCode);
                EmitStackTop(arrayElementType);
            }
        }
        internal void Ldelema(Type arrayElementType)
        {
            OpCode opCode = OpCodes.Ldelema;
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction(opCode.ToString());
            _ilGen.Emit(opCode, arrayElementType);
 
            EmitStackTop(arrayElementType);
        }
 
        private OpCode GetStelemOpCode(TypeCode typeCode)
        {
            switch (typeCode)
            {
                case TypeCode.Object:
                    return OpCodes.Stelem_Ref;// TypeCode.Object:
                case TypeCode.Boolean:
                    return OpCodes.Stelem_I1;// TypeCode.Boolean:
                case TypeCode.Char:
                    return OpCodes.Stelem_I2;// TypeCode.Char:
                case TypeCode.SByte:
                    return OpCodes.Stelem_I1;// TypeCode.SByte:
                case TypeCode.Byte:
                    return OpCodes.Stelem_I1;// TypeCode.Byte:
                case TypeCode.Int16:
                    return OpCodes.Stelem_I2;// TypeCode.Int16:
                case TypeCode.UInt16:
                    return OpCodes.Stelem_I2;// TypeCode.UInt16:
                case TypeCode.Int32:
                    return OpCodes.Stelem_I4;// TypeCode.Int32:
                case TypeCode.UInt32:
                    return OpCodes.Stelem_I4;// TypeCode.UInt32:
                case TypeCode.Int64:
                    return OpCodes.Stelem_I8;// TypeCode.Int64:
                case TypeCode.UInt64:
                    return OpCodes.Stelem_I8;// TypeCode.UInt64:
                case TypeCode.Single:
                    return OpCodes.Stelem_R4;// TypeCode.Single:
                case TypeCode.Double:
                    return OpCodes.Stelem_R8;// TypeCode.Double:
                case TypeCode.String:
                    return OpCodes.Stelem_Ref;// TypeCode.String:
                default:
                    return OpCodes.Nop;
            }
        }
 
        internal void Stelem(Type arrayElementType)
        {
            if (arrayElementType.GetTypeInfo().IsEnum)
                Stelem(Enum.GetUnderlyingType(arrayElementType));
            else
            {
                OpCode opCode = GetStelemOpCode(arrayElementType.GetTypeCode());
                if (opCode.Equals(OpCodes.Nop))
                    throw /*System.Runtime.Serialization.*/DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(string.Format(SRSerialization.ArrayTypeIsNotSupported, DataContract.GetClrTypeFullName(arrayElementType))));
                if (_codeGenTrace != CodeGenTrace.None)
                    EmitSourceInstruction(opCode.ToString());
                EmitStackTop(arrayElementType);
                _ilGen.Emit(opCode);
            }
        }
 
        internal Label DefineLabel()
        {
            return _ilGen.DefineLabel();
        }
 
        internal void MarkLabel(Label label)
        {
            _ilGen.MarkLabel(label);
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceLabel(label.GetHashCode() + ":");
        }
 
        internal void Add()
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Add");
            _ilGen.Emit(OpCodes.Add);
        }
 
        internal void Subtract()
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Sub");
            _ilGen.Emit(OpCodes.Sub);
        }
 
        internal void And()
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("And");
            _ilGen.Emit(OpCodes.And);
        }
        internal void Or()
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Or");
            _ilGen.Emit(OpCodes.Or);
        }
 
        internal void Not()
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Not");
            _ilGen.Emit(OpCodes.Not);
        }
 
        internal void Ret()
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Ret");
            _ilGen.Emit(OpCodes.Ret);
        }
 
        internal void Br(Label label)
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Br " + label.GetHashCode());
            _ilGen.Emit(OpCodes.Br, label);
        }
 
        internal void Blt(Label label)
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Blt " + label.GetHashCode());
            _ilGen.Emit(OpCodes.Blt, label);
        }
 
        internal void Brfalse(Label label)
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Brfalse " + label.GetHashCode());
            _ilGen.Emit(OpCodes.Brfalse, label);
        }
 
        internal void Brtrue(Label label)
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Brtrue " + label.GetHashCode());
            _ilGen.Emit(OpCodes.Brtrue, label);
        }
 
 
 
        internal void Pop()
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Pop");
            _ilGen.Emit(OpCodes.Pop);
        }
 
        internal void Dup()
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Dup");
            _ilGen.Emit(OpCodes.Dup);
        }
 
        private void LoadThis(object thisObj, MethodInfo methodInfo)
        {
            if (thisObj != null && !methodInfo.IsStatic)
            {
                LoadAddress(thisObj);
                ConvertAddress(GetVariableType(thisObj), methodInfo.DeclaringType);
            }
        }
 
        private void LoadParam(object arg, int oneBasedArgIndex, MethodBase methodInfo)
        {
            Load(arg);
            if (arg != null)
                ConvertValue(GetVariableType(arg), methodInfo.GetParameters()[oneBasedArgIndex - 1].ParameterType);
        }
 
        private void InternalIf(bool negate)
        {
            IfState ifState = new IfState();
            ifState.EndIf = DefineLabel();
            ifState.ElseBegin = DefineLabel();
            if (negate)
                Brtrue(ifState.ElseBegin);
            else
                Brfalse(ifState.ElseBegin);
            _blockStack.Push(ifState);
        }
 
        private OpCode GetConvOpCode(TypeCode typeCode)
        {
            switch (typeCode)
            {
                case TypeCode.Boolean:
                    return OpCodes.Conv_I1;// TypeCode.Boolean:
                case TypeCode.Char:
                    return OpCodes.Conv_I2;// TypeCode.Char:
                case TypeCode.SByte:
                    return OpCodes.Conv_I1;// TypeCode.SByte:
                case TypeCode.Byte:
                    return OpCodes.Conv_U1;// TypeCode.Byte:
                case TypeCode.Int16:
                    return OpCodes.Conv_I2;// TypeCode.Int16:
                case TypeCode.UInt16:
                    return OpCodes.Conv_U2;// TypeCode.UInt16:
                case TypeCode.Int32:
                    return OpCodes.Conv_I4;// TypeCode.Int32:
                case TypeCode.UInt32:
                    return OpCodes.Conv_U4;// TypeCode.UInt32:
                case TypeCode.Int64:
                    return OpCodes.Conv_I8;// TypeCode.Int64:
                case TypeCode.UInt64:
                    return OpCodes.Conv_I8;// TypeCode.UInt64:
                case TypeCode.Single:
                    return OpCodes.Conv_R4;// TypeCode.Single:
                case TypeCode.Double:
                    return OpCodes.Conv_R8;// TypeCode.Double:
                default:
                    return OpCodes.Nop;
            }
        }
 
        private void InternalConvert(Type source, Type target, bool isAddress)
        {
            if (target == source)
                return;
            if (target.GetTypeInfo().IsValueType)
            {
                if (source.GetTypeInfo().IsValueType)
                {
                    OpCode opCode = GetConvOpCode(target.GetTypeCode());
                    if (opCode.Equals(OpCodes.Nop))
                        throw /*System.Runtime.Serialization.*/DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(string.Format(SRSerialization.NoConversionPossibleTo, DataContract.GetClrTypeFullName(target))));
                    else
                    {
                        if (_codeGenTrace != CodeGenTrace.None)
                            EmitSourceInstruction(opCode.ToString());
                        _ilGen.Emit(opCode);
                    }
                }
                else if (source.IsAssignableFrom(target))
                {
                    Unbox(target);
                    if (!isAddress)
                        Ldobj(target);
                }
                else
                    throw /*System.Runtime.Serialization.*/DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(string.Format(SRSerialization.IsNotAssignableFrom, DataContract.GetClrTypeFullName(target), DataContract.GetClrTypeFullName(source))));
            }
            else if (target.IsAssignableFrom(source))
            {
                if (source.GetTypeInfo().IsValueType)
                {
                    if (isAddress)
                        Ldobj(source);
                    Box(source);
                }
            }
            else if (source.IsAssignableFrom(target))
            {
                Castclass(target);
            }
            else if (target.GetTypeInfo().IsInterface || source.GetTypeInfo().IsInterface)
            {
                Castclass(target);
            }
            else
                throw /*System.Runtime.Serialization.*/DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(string.Format(SRSerialization.IsNotAssignableFrom, DataContract.GetClrTypeFullName(target), DataContract.GetClrTypeFullName(source))));
        }
 
        private IfState PopIfState()
        {
            object stackTop = _blockStack.Pop();
            IfState ifState = stackTop as IfState;
            if (ifState == null)
                ThrowMismatchException(stackTop);
            return ifState;
        }
 
#if USE_REFEMIT
        [SecuritySafeCritical]
        void InitAssemblyBuilder(string methodName)
        {
            AssemblyName name = new AssemblyName();
            name.Name = "Microsoft.GeneratedCode."+methodName;
            //Add SecurityCritical and SecurityTreatAsSafe attributes to the generated method
            assemblyBuilder = AppDomain.CurrentDomain.DefineDynamicAssembly(name, AssemblyBuilderAccess.Run);
            moduleBuilder = assemblyBuilder.DefineDynamicModule(name.Name + ".dll", false);
        }
#endif
 
        private void ThrowMismatchException(object expected)
        {
            throw /*System.Runtime.Serialization.*/DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(string.Format(SRSerialization.ExpectingEnd, expected.ToString())));
        }
 
 
        [Conditional("NOT_SILVERLIGHT")]
        internal void EmitSourceInstruction(string line)
        {
        }
 
        [Conditional("NOT_SILVERLIGHT")]
        internal void EmitSourceLabel(string line)
        {
        }
 
        [Conditional("NOT_SILVERLIGHT")]
        internal void EmitSourceComment(string comment)
        {
        }
 
 
        internal void EmitStackTop(Type stackTopType)
        {
            if (_codeGenTrace != CodeGenTrace.Tron)
                return;
        }
 
        internal Label[] Switch(int labelCount)
        {
            SwitchState switchState = new SwitchState(DefineLabel(), DefineLabel());
            Label[] caseLabels = new Label[labelCount];
            for (int i = 0; i < caseLabels.Length; i++)
                caseLabels[i] = DefineLabel();
 
            _ilGen.Emit(OpCodes.Switch, caseLabels);
            Br(switchState.DefaultLabel);
            _blockStack.Push(switchState);
            return caseLabels;
        }
        internal void Case(Label caseLabel1, string caseLabelName)
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("case " + caseLabelName + "{");
            MarkLabel(caseLabel1);
        }
 
        internal void EndCase()
        {
            object stackTop = _blockStack.Peek();
            SwitchState switchState = stackTop as SwitchState;
            if (switchState == null)
                ThrowMismatchException(stackTop);
            Br(switchState.EndOfSwitchLabel);
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("} //end case ");
        }
 
        internal void EndSwitch()
        {
            object stackTop = _blockStack.Pop();
            SwitchState switchState = stackTop as SwitchState;
            if (switchState == null)
                ThrowMismatchException(stackTop);
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("} //end switch");
            if (!switchState.DefaultDefined)
                MarkLabel(switchState.DefaultLabel);
            MarkLabel(switchState.EndOfSwitchLabel);
        }
 
        private static MethodInfo s_stringLength = typeof(string).GetProperty("Length").GetMethod;
        internal void ElseIfIsEmptyString(LocalBuilder strLocal)
        {
            IfState ifState = (IfState)_blockStack.Pop();
            Br(ifState.EndIf);
            MarkLabel(ifState.ElseBegin);
 
            Load(strLocal);
            Call(s_stringLength);
            Load(0);
            ifState.ElseBegin = DefineLabel();
            _ilGen.Emit(GetBranchCode(Cmp.EqualTo), ifState.ElseBegin);
            _blockStack.Push(ifState);
        }
 
        internal void IfNotIsEmptyString(LocalBuilder strLocal)
        {
            Load(strLocal);
            Call(s_stringLength);
            Load(0);
            If(Cmp.NotEqualTo);
        }
 
#if !NET_NATIVE
        internal void BeginWhileCondition()
        {
            Label startWhile = DefineLabel();
            MarkLabel(startWhile);
            _blockStack.Push(startWhile);
        }
 
        internal void BeginWhileBody(Cmp cmpOp)
        {
            Label startWhile = (Label)_blockStack.Pop();
            If(cmpOp);
            _blockStack.Push(startWhile);
        }
 
        internal void EndWhile()
        {
            Label startWhile = (Label)_blockStack.Pop();
            Br(startWhile);
            EndIf();
        }
 
        internal void CallStringFormat(string msg, params object[] values)
        {
            NewArray(typeof(object), values.Length);
            if (_stringFormatArray == null)
                _stringFormatArray = DeclareLocal(typeof(object[]), "stringFormatArray");
            Stloc(_stringFormatArray);
            for (int i = 0; i < values.Length; i++)
                StoreArrayElement(_stringFormatArray, i, values[i]);
 
            Load(msg);
            Load(_stringFormatArray);
            Call(StringFormat);
        }
 
        internal void ToString(Type type)
        {
            if (type != Globals.TypeOfString)
            {
                if (type.GetTypeInfo().IsValueType)
                {
                    Box(type);
                }
                Call(ObjectToString);
            }
        }
#endif
    }
 
 
    internal class ArgBuilder
    {
        internal int Index;
        internal Type ArgType;
        internal ArgBuilder(int index, Type argType)
        {
            this.Index = index;
            this.ArgType = argType;
        }
    }
 
    internal class ForState
    {
        private LocalBuilder _indexVar;
        private Label _beginLabel;
        private Label _testLabel;
        private Label _endLabel;
        private bool _requiresEndLabel;
        private object _end;
 
        internal ForState(LocalBuilder indexVar, Label beginLabel, Label testLabel, object end)
        {
            _indexVar = indexVar;
            _beginLabel = beginLabel;
            _testLabel = testLabel;
            _end = end;
        }
 
        internal LocalBuilder Index
        {
            get
            {
                return _indexVar;
            }
        }
 
        internal Label BeginLabel
        {
            get
            {
                return _beginLabel;
            }
        }
 
        internal Label TestLabel
        {
            get
            {
                return _testLabel;
            }
        }
 
        internal Label EndLabel
        {
            get
            {
                return _endLabel;
            }
            set
            {
                _endLabel = value;
            }
        }
 
        internal bool RequiresEndLabel
        {
            get
            {
                return _requiresEndLabel;
            }
            set
            {
                _requiresEndLabel = value;
            }
        }
 
        internal object End
        {
            get
            {
                return _end;
            }
        }
    }
 
    internal enum Cmp
    {
        LessThan,
        EqualTo,
        LessThanOrEqualTo,
        GreaterThan,
        NotEqualTo,
        GreaterThanOrEqualTo
    }
 
    internal class IfState
    {
        private Label _elseBegin;
        private Label _endIf;
 
        internal Label EndIf
        {
            get
            {
                return _endIf;
            }
            set
            {
                _endIf = value;
            }
        }
 
        internal Label ElseBegin
        {
            get
            {
                return _elseBegin;
            }
            set
            {
                _elseBegin = value;
            }
        }
    }
 
 
    internal class SwitchState
    {
        private Label _defaultLabel;
        private Label _endOfSwitchLabel;
        private bool _defaultDefined;
        internal SwitchState(Label defaultLabel, Label endOfSwitchLabel)
        {
            _defaultLabel = defaultLabel;
            _endOfSwitchLabel = endOfSwitchLabel;
            _defaultDefined = false;
        }
        internal Label DefaultLabel
        {
            get
            {
                return _defaultLabel;
            }
        }
 
        internal Label EndOfSwitchLabel
        {
            get
            {
                return _endOfSwitchLabel;
            }
        }
        internal bool DefaultDefined
        {
            get
            {
                return _defaultDefined;
            }
            set
            {
                _defaultDefined = value;
            }
        }
    }
}
#endif