File: ServiceLookup\CompiledServiceProviderEngine.cs
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Project: src\src\libraries\Microsoft.Extensions.DependencyInjection\src\Microsoft.Extensions.DependencyInjection.csproj (Microsoft.Extensions.DependencyInjection)
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System;
using System.Diagnostics.CodeAnalysis;
 
namespace Microsoft.Extensions.DependencyInjection.ServiceLookup
{
    internal abstract class CompiledServiceProviderEngine : ServiceProviderEngine
    {
#if IL_EMIT
        public ILEmitResolverBuilder ResolverBuilder { get; }
#else
        public ExpressionResolverBuilder ResolverBuilder { get; }
#endif
 
        [RequiresDynamicCode("Creates DynamicMethods")]
        public CompiledServiceProviderEngine(ServiceProvider provider)
        {
            ResolverBuilder = new(provider);
        }
 
        public override Func<ServiceProviderEngineScope, object?> RealizeService(ServiceCallSite callSite) => ResolverBuilder.Build(callSite);
    }
}