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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Collections.Specialized;
using System.Drawing;
using System.Formats.Nrbf;
using System.Reflection.Metadata;
using System.Runtime.InteropServices;
using System.Runtime.Serialization.Formatters.Binary;
using System.Text.Json;
using Windows.Win32.System.Com;
using Com = Windows.Win32.System.Com;
namespace System.Windows.Forms;
/// <summary>
/// Provides methods to place data on and retrieve data from the system clipboard. This class cannot be inherited.
/// </summary>
public static class Clipboard
{
/// <summary>
/// Places non-persistent data on the system <see cref="Clipboard"/>.
/// </summary>
/// <inheritdoc cref="SetDataObject(object, bool, int, int)"/>
public static void SetDataObject(object data) => SetDataObject(data, copy: false);
/// <summary>
/// Overload that uses default values for retryTimes and retryDelay.
/// </summary>
/// <inheritdoc cref="SetDataObject(object, bool, int, int)"/>
public static void SetDataObject(object data, bool copy) =>
SetDataObject(data, copy, retryTimes: 10, retryDelay: 100);
/// <summary>
/// Places data on the system <see cref="Clipboard"/> and uses copy to specify whether the data
/// should remain on the <see cref="Clipboard"/> after the application exits.
/// </summary>
/// <remarks>
/// <para>
/// See remarks for <see cref="DataObject(object)"/> for recommendations on how to implement custom <paramref name="data"/>.
/// </para>
/// </remarks>
public static unsafe void SetDataObject(object data, bool copy, int retryTimes, int retryDelay)
{
if (Application.OleRequired() != ApartmentState.STA)
{
throw new ThreadStateException(SR.ThreadMustBeSTA);
}
ArgumentNullException.ThrowIfNull(data);
ArgumentOutOfRangeException.ThrowIfNegative(retryTimes);
ArgumentOutOfRangeException.ThrowIfNegative(retryDelay);
// Always wrap the data in our DataObject since we know how to retrieve our DataObject from the proxy OleGetClipboard returns.
DataObject wrappedData = data is DataObject { IsWrappedForClipboard: true } alreadyWrapped
? alreadyWrapped
: new DataObject(data) { IsWrappedForClipboard = true };
using var dataObject = ComHelpers.GetComScope<Com.IDataObject>(wrappedData);
HRESULT hr;
int retry = retryTimes;
while ((hr = PInvoke.OleSetClipboard(dataObject)).Failed)
{
if (--retry < 0)
{
throw new ExternalException(SR.ClipboardOperationFailed, (int)hr);
}
Thread.Sleep(millisecondsTimeout: retryDelay);
}
if (copy)
{
retry = retryTimes;
while ((hr = PInvoke.OleFlushClipboard()).Failed)
{
if (--retry < 0)
{
throw new ExternalException(SR.ClipboardOperationFailed, (int)hr);
}
Thread.Sleep(millisecondsTimeout: retryDelay);
}
}
}
/// <summary>
/// Retrieves the data that is currently on the system <see cref="Clipboard"/>.
/// </summary>
public static unsafe IDataObject? GetDataObject()
{
if (Application.OleRequired() != ApartmentState.STA)
{
// Only throw if a message loop was started. This makes the case of trying to query the clipboard from the
// finalizer or non-UI MTA thread silently fail, instead of making the application die.
return Application.MessageLoop ? throw new ThreadStateException(SR.ThreadMustBeSTA) : null;
}
int retryTimes = 10;
using ComScope<Com.IDataObject> proxyDataObject = new(null);
HRESULT hr;
while ((hr = PInvoke.OleGetClipboard(proxyDataObject)).Failed)
{
if (--retryTimes < 0)
{
throw new ExternalException(SR.ClipboardOperationFailed, (int)hr);
}
Thread.Sleep(millisecondsTimeout: 100);
}
// OleGetClipboard always returns a proxy. The proxy forwards all IDataObject method calls to the real data object,
// without giving out the real data object. If the data placed on the clipboard is not one of our CCWs or the clipboard
// has been flushed, marshal will create a wrapper around the proxy for us to use. However, if the data placed on
// the clipboard is one of our own and the clipboard has not been flushed, we need to retrieve the real data object
// pointer in order to retrieve the original managed object via ComWrappers. To do this, we must query for an
// interface that is not known to the proxy e.g. IComCallableWrapper. If we are able to query for IComCallableWrapper
// it means that the real data object is one of our CCWs and we've retrieved it successfully,
// otherwise it is not ours and we will use the wrapped proxy.
IUnknown* target = default;
var realDataObject = proxyDataObject.TryQuery<IComCallableWrapper>(out hr);
if (hr.Succeeded)
{
target = realDataObject.AsUnknown;
}
else
{
target = proxyDataObject.AsUnknown;
}
if (!ComHelpers.TryGetObjectForIUnknown(target, out object? managedDataObject))
{
target->Release();
return null;
}
if (managedDataObject is not Com.IDataObject.Interface dataObject)
{
// We always wrap data set on the Clipboard in a DataObject, so if we do not have
// a IDataObject.Interface this means built-in com support is turned off and
// we have a proxy where there is no way to retrieve the original data object
// pointer from it likely because either the clipboard was flushed or the data on the
// clipboard is from another process. We need to mimic built-in com behavior and wrap the proxy ourselves.
// DataObject will ref count proxyDataObject properly to take ownership.
return new DataObject(proxyDataObject.Value);
}
if (dataObject is DataObject { IsWrappedForClipboard: true } wrappedData)
{
// There is a DataObject on the clipboard that we placed there. If the real data object
// implements IDataObject, we want to unwrap it and return it. Otherwise return
// the DataObject as is.
return wrappedData.TryUnwrapInnerIDataObject();
}
// We did not place the data on the clipboard. Fall back to old behavior.
return dataObject is IDataObject ido && !Marshal.IsComObject(dataObject)
? ido
: new DataObject(dataObject);
}
/// <summary>
/// Removes all data from the Clipboard.
/// </summary>
public static unsafe void Clear()
{
if (Application.OleRequired() != ApartmentState.STA)
{
throw new ThreadStateException(SR.ThreadMustBeSTA);
}
HRESULT hr;
int retry = 10;
while ((hr = PInvoke.OleSetClipboard(null)).Failed)
{
if (--retry < 0)
{
#pragma warning disable CA2201 // Do not raise reserved exception types
throw new ExternalException(SR.ClipboardOperationFailed, (int)hr);
#pragma warning restore CA2201
}
Thread.Sleep(millisecondsTimeout: 100);
}
}
/// <summary>
/// Indicates whether there is data on the Clipboard in the <see cref="DataFormats.WaveAudio"/> format.
/// </summary>
public static bool ContainsAudio() => ContainsData(DataFormats.WaveAudioConstant);
/// <summary>
/// Indicates whether there is data on the Clipboard that is in the specified format
/// or can be converted to that format.
/// </summary>
public static bool ContainsData(string? format) =>
!string.IsNullOrWhiteSpace(format) && ContainsData(format, autoConvert: false);
private static bool ContainsData(string format, bool autoConvert) =>
GetDataObject() is IDataObject dataObject && dataObject.GetDataPresent(format, autoConvert: autoConvert);
/// <summary>
/// Indicates whether there is data on the Clipboard that is in the <see cref="DataFormats.FileDrop"/> format
/// or can be converted to that format.
/// </summary>
public static bool ContainsFileDropList() => ContainsData(DataFormats.FileDrop, autoConvert: true);
/// <summary>
/// Indicates whether there is data on the Clipboard that is in the <see cref="DataFormats.Bitmap"/> format
/// or can be converted to that format.
/// </summary>
public static bool ContainsImage() => ContainsData(DataFormats.Bitmap, autoConvert: true);
/// <summary>
/// Indicates whether there is text data on the Clipboard in <see cref="TextDataFormat.UnicodeText"/> format.
/// </summary>
public static bool ContainsText() => ContainsText(TextDataFormat.UnicodeText);
/// <summary>
/// Indicates whether there is text data on the Clipboard in the format indicated by the specified
/// <see cref="TextDataFormat"/> value.
/// </summary>
public static bool ContainsText(TextDataFormat format)
{
SourceGenerated.EnumValidator.Validate(format, nameof(format));
return ContainsData(ConvertToDataFormats(format));
}
/// <summary>
/// Retrieves an audio stream from the <see cref="Clipboard"/>.
/// </summary>
public static Stream? GetAudioStream() => GetTypedDataIfAvailable<Stream>(DataFormats.WaveAudioConstant);
/// <summary>
/// Retrieves data from the <see cref="Clipboard"/> in the specified format.
/// </summary>
/// <exception cref="ThreadStateException">
/// The current thread is not in single-threaded apartment (STA) mode.
/// </exception>
[Obsolete(
Obsoletions.ClipboardGetDataMessage,
error: false,
DiagnosticId = Obsoletions.ClipboardGetDataDiagnosticId,
UrlFormat = Obsoletions.SharedUrlFormat)]
public static object? GetData(string format) =>
string.IsNullOrWhiteSpace(format) ? null : GetData(format, autoConvert: false);
private static object? GetData(string format, bool autoConvert) =>
GetDataObject() is IDataObject dataObject ? dataObject.GetData(format, autoConvert) : null;
/// <summary>
/// Retrieves data from the <see cref="Clipboard"/> in the specified format if that data is of type <typeparamref name="T"/>.
/// This is an alternative to <see cref="GetData(string)"/> that uses <see cref="BinaryFormatter"/> only when application
/// enabled the <see cref="AppContext"/> switch named "Windows.ClipboardDragDrop.EnableUnsafeBinaryFormatterSerialization".
/// By default the NRBF deserializer attempts to deserialize the stream. It can be disabled in favor of <see cref="BinaryFormatter"/>
/// with <see cref="AppContext"/> switch named "Windows.ClipboardDragDrop.EnableNrbfSerialization".
/// </summary>
/// <param name="format">
/// <para>
/// The format of the data to retrieve. See the <see cref="DataFormats"/> class for a set of predefined data formats.
/// </para>
/// </param>
/// <param name="resolver">
/// <para>
/// A <see cref="Func{Type, TypeName}"/> that is used only when deserializing non-OLE formats. It returns the type if
/// <see cref="TypeName"/> is allowed or throws a <see cref="NotSupportedException"/> if <see cref="TypeName"/> is not
/// expected. It should not return a <see langword="null"/>. It should resolve type requested by the user as
/// <typeparamref name="T"/>, as well as types of its fields, unless they are primitive or known types.
/// </para>
/// <para>
/// The following types are resolved automatically:
/// </para>
/// <list type="bullet">
/// <item>
/// <description>
/// NRBF primitive types <see href="https://learn.microsoft.com/openspecs/windows_protocols/ms-nrbf/4e77849f-89e3-49db-8fb9-e77ee4bc7214"/>
/// (bool, byte, char, decimal, double, short, int, long, sbyte, ushort, uint, ulong, float, string, TimeSpan, DateTime).
/// </description>
/// </item>
/// <item>
/// <description>
/// System.Drawing.Primitive.dll exchange types (PointF, RectangleF, Point, Rectangle, SizeF, Size, Color).
/// </description>
/// </item>
/// <item>
/// <description>
/// Types commonly used in WinForms applications (System.Drawing.Bitmap, System.Windows.Forms.ImageListStreamer,
/// System.NotSupportedException, only the message is re-hydrated, List{T} where T is an NRBF primitive type,
/// and arrays of NRBF primitive types).
/// </description>
/// </item>
/// </list>
/// <para>
/// <see cref="TypeName"/> parameter can be matched according to the user requirements, for example, only namespace-qualified
/// type names, or full type and assembly names, or full type names and short assembly names.
/// </para>
/// </param>
/// <param name="data">
/// <para>
/// Out parameter that contains the retrieved data in the specified format, or <see lanfword="null"/> if the data is
/// unavailable in the specified format, or is of a wrong <see cref="Type"/>.
/// </para>
/// </param>
/// <returns>
/// <see langword="true"/> if the data of this format is present on the clipboard and the value is
/// of a matching type and that value can be successfully retrieved, or <see langword="false"/>
/// if the format is not present or the value is of a wrong <see cref="Type"/>.
/// </returns>
/// <remarks>
/// <para>
/// Avoid loading assemblies named in the <see cref="TypeName"/> argument of the resolver function. Resolve only types
/// available at the compile time, for example do not call the <see cref="Type.GetType(string)"/> method.
/// </para>
/// <para>
/// Some common types, for example <see cref="Bitmap"/>, are type-forwarded from .NET Framework assemblies using the
/// <see cref="Runtime.CompilerServices.TypeForwardedFromAttribute"/>. <see cref="BinaryFormatter"/> serializes these types
/// using the forwarded from assembly information. The resolver function should take this into account and either
/// match only namespace qualified type names or read the <see cref="Runtime.CompilerServices.TypeForwardedFromAttribute.AssemblyFullName"/>
/// from the allowed type and match it to the <see cref="AssemblyNameInfo.FullName"/> property of <see cref="TypeName.AssemblyName"/>.
/// </para>
/// <para>
/// Make sure to match short assembly names if other information, such as version, is not needed, for example, when your
/// application can read multiple versions of the type. For exact matching, including assembly version, resolver
/// function is required, however primitive and common types are always matched after assembly version is removed.
/// </para>
/// <para>
/// Arrays, generic types, and nullable value types have full element name, including its assembly name, in the
/// <see cref="TypeName.FullName"/> property. Resolver function should either remove or type-forward these assembly
/// names when matching.
/// </para>
/// </remarks>
/// <exception cref="NotSupportedException">
/// If application does not support <see cref="BinaryFormatter"/> and the object can't be deserialized otherwise, or
/// application supports <see cref="BinaryFormatter"/> but <typeparamref name="T"/> is an <see cref="object"/>,
/// or not a concrete type, or if <paramref name="resolver"/> does not resolve the actual payload type. Or
/// the <see cref="IDataObject"/> on the <see cref="Clipboard"/> does not implement <see cref="ITypedDataObject"/>
/// interface.
/// </exception>
/// <example>
/// <![CDATA[
/// using System.Reflection.Metadata;
///
/// internal static Type MyExactMatchResolver(TypeName typeName)
/// {
/// // The preferred approach is to resolve types at build time to avoid assembly loading at runtime.
/// (Type type, TypeName typeName)[] allowedTypes =
/// [
/// (typeof(MyClass1), TypeName.Parse(typeof(MyClass1).AssemblyQualifiedName)),
/// (typeof(MyClass2), TypeName.Parse(typeof(MyClass2).AssemblyQualifiedName))
/// ];
///
/// foreach (var (type, name) in allowedTypes)
/// {
/// // Namespace-qualified type name, using case-sensitive comparison for C#.
/// if (name.FullName != typeName.FullName)
/// {
/// continue;
/// }
///
/// AssemblyNameInfo? info1 = typeName.AssemblyName;
/// AssemblyNameInfo? info2 = name.AssemblyName;
///
/// if (info1 is null && info2 is null)
/// {
/// return type;
/// }
///
/// if (info1 is null || info2 is null)
/// {
/// continue;
/// }
///
/// // Full assembly name comparison, case sensitive.
/// if (info1.Name == info2.Name
/// && info1.Version == info2.Version
/// && ((info1.CultureName ?? string.Empty) == info2.CultureName)
/// && info1.PublicKeyOrToken.AsSpan().SequenceEqual(info2.PublicKeyOrToken.AsSpan()))
/// {
/// return type;
/// }
/// }
///
/// throw new NotSupportedException($"Can't resolve {typeName.AssemblyQualifiedName}");
/// }
/// ]]>
/// </example>
[CLSCompliant(false)]
public static bool TryGetData<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.All)] T>(
string format,
Func<TypeName, Type> resolver,
[NotNullWhen(true), MaybeNullWhen(false)] out T data)
{
data = default;
resolver.OrThrowIfNull();
return GetTypedDataObject<T>(format, out ITypedDataObject? typed)
&& typed.TryGetData(format, resolver, autoConvert: false, out data);
}
/// <inheritdoc cref="TryGetData{T}(string, Func{TypeName, Type}, out T)"/>
public static bool TryGetData<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.All)] T>(
string format,
[NotNullWhen(true), MaybeNullWhen(false)] out T data)
{
data = default;
return GetTypedDataObject<T>(format, out ITypedDataObject? typed) && typed.TryGetData(format, out data);
}
private static bool GetTypedDataObject<T>(
string format,
[NotNullWhen(true), MaybeNullWhen(false)] out ITypedDataObject typed)
{
typed = default;
if (!DataObject.IsValidFormatAndType<T>(format)
|| GetDataObject() is not { } dataObject)
{
// Invalid format or no object on the clipboard at all.
return false;
}
if (dataObject is not ITypedDataObject typedDataObject)
{
throw new NotSupportedException(
string.Format(SR.ITypeDataObject_Not_Implemented, dataObject.GetType().FullName));
}
typed = typedDataObject;
return true;
}
/// <summary>
/// Retrieves a collection of file names from the <see cref="Clipboard"/>.
/// </summary>
public static StringCollection GetFileDropList()
{
StringCollection result = [];
if (GetTypedDataIfAvailable<string[]?>(DataFormats.FileDropConstant) is string[] strings)
{
result.AddRange(strings);
}
return result;
}
/// <summary>
/// Retrieves a <see cref="Bitmap"/> from the <see cref="Clipboard"/>.
/// </summary>
/// <devdoc>
/// <see cref="Bitmap"/>s are re-hydrated from a <see cref="SerializationRecord"/> by reading a byte array.
/// </devdoc>
public static Image? GetImage() => GetTypedDataIfAvailable<Image>(DataFormats.Bitmap);
/// <summary>
/// Retrieves text data from the <see cref="Clipboard"/> in the <see cref="TextDataFormat.UnicodeText"/> format.
/// </summary>
public static string GetText() => GetText(TextDataFormat.UnicodeText);
/// <summary>
/// Retrieves text data from the <see cref="Clipboard"/> in the format indicated by the specified
/// <see cref="TextDataFormat"/> value.
/// </summary>
public static string GetText(TextDataFormat format)
{
SourceGenerated.EnumValidator.Validate(format, nameof(format));
return GetTypedDataIfAvailable<string>(ConvertToDataFormats(format)) is string text ? text : string.Empty;
}
private static T? GetTypedDataIfAvailable<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.All)] T>(string format)
{
IDataObject? data = GetDataObject();
if (data is ITypedDataObject typed)
{
return typed.TryGetData(format, autoConvert: true, out T? value) ? value : default;
}
if (data is IDataObject dataObject)
{
return dataObject.GetData(format, autoConvert: true) is T value ? value : default;
}
return default;
}
/// <summary>
/// Clears the <see cref="Clipboard"/> and then adds data in the <see cref="DataFormats.WaveAudio"/> format.
/// </summary>
public static void SetAudio(byte[] audioBytes) => SetAudio(new MemoryStream(audioBytes.OrThrowIfNull()));
/// <summary>
/// Clears the <see cref="Clipboard"/> and then adds data in the <see cref="DataFormats.WaveAudio"/> format.
/// </summary>
public static void SetAudio(Stream audioStream) =>
SetDataObject(new DataObject(DataFormats.WaveAudioConstant, audioStream.OrThrowIfNull()), copy: true);
/// <summary>
/// Clears the Clipboard and then adds data in the specified format.
/// </summary>
/// <remarks>
/// <para>
/// See remarks for <see cref="DataObject(object)"/> for recommendations on how to implement custom <paramref name="data"/>.
/// </para>
/// </remarks>
public static void SetData(string format, object data)
{
if (string.IsNullOrWhiteSpace(format.OrThrowIfNull()))
{
throw new ArgumentException(SR.DataObjectWhitespaceEmptyFormatNotAllowed, nameof(format));
}
// Note: We delegate argument checking to IDataObject.SetData, if it wants to do so.
SetDataObject(new DataObject(format, data), copy: true);
}
/// <summary>
/// Saves the data onto the clipboard in the specified format.
/// If the data is a non intrinsic type, the object will be serialized using JSON.
/// </summary>
/// <exception cref="ArgumentException">
/// <see langword="null"/>, empty string, or whitespace was passed as the format.
/// </exception>
/// <exception cref="InvalidOperationException">
/// If <paramref name="data"/> is a non derived <see cref="DataObject"/>. This is for better error reporting as <see cref="DataObject"/> will serialize as empty.
/// If <see cref="DataObject"/> needs to be placed on the clipboard, use <see cref="DataObject.SetDataAsJson{T}(string, T)"/>
/// to JSON serialize the data to be held in the <paramref name="data"/>, then set the <paramref name="data"/>
/// onto the clipboard via <see cref="SetDataObject(object)"/>.
/// </exception>
/// <remarks>
/// <para>
/// If your data is an intrinsically handled type such as primitives, string, or Bitmap
/// and you are using a custom format or <see cref="DataFormats.Serializable"/>,
/// it is recommended to use the <see cref="SetData(string, object?)"/> APIs to avoid unnecessary overhead.
/// </para>
/// <para>
/// The default behavior of <see cref="JsonSerializer"/> is used to serialize the data.
/// </para>
/// <para>
/// See
/// <see href="https://learn.microsoft.com/dotnet/standard/serialization/system-text-json/how-to#serialization-behavior"/>
/// and <see href="https://learn.microsoft.com/dotnet/standard/serialization/system-text-json/reflection-vs-source-generation#metadata-collection"/>
/// for more details on default <see cref="JsonSerializer"/> behavior.
/// </para>
/// <para>
/// If custom JSON serialization behavior is needed, manually JSON serialize the data and then use <see cref="SetData"/>
/// to save the data onto the clipboard, or create a custom <see cref="Text.Json.Serialization.JsonConverter"/>, attach the
/// <see cref="Text.Json.Serialization.JsonConverterAttribute"/>, and then recall this method.
/// See <see href="https://learn.microsoft.com/dotnet/standard/serialization/system-text-json/converters-how-to"/> for more details
/// on custom converters for JSON serialization.
/// </para>
/// </remarks>
[RequiresUnreferencedCode("Uses default System.Text.Json behavior which is not trim-compatible.")]
public static void SetDataAsJson<T>(string format, T data)
{
data.OrThrowIfNull(nameof(data));
if (string.IsNullOrWhiteSpace(format.OrThrowIfNull()))
{
throw new ArgumentException(SR.DataObjectWhitespaceEmptyFormatNotAllowed, nameof(format));
}
if (typeof(T) == typeof(DataObject))
{
throw new InvalidOperationException(string.Format(SR.ClipboardOrDragDrop_CannotJsonSerializeDataObject, nameof(SetDataObject)));
}
DataObject dataObject = new();
dataObject.SetDataAsJson(format, data);
SetDataObject(dataObject, copy: true);
}
/// <summary>
/// Clears the Clipboard and then adds a collection of file names in the <see cref="DataFormats.FileDrop"/> format.
/// </summary>
public static void SetFileDropList(StringCollection filePaths)
{
if (filePaths.OrThrowIfNull().Count == 0)
{
throw new ArgumentException(SR.CollectionEmptyException);
}
// Validate the paths to make sure they don't contain invalid characters
string[] filePathsArray = new string[filePaths.Count];
filePaths.CopyTo(filePathsArray, 0);
foreach (string path in filePathsArray)
{
// These are the only error states for Path.GetFullPath
if (string.IsNullOrEmpty(path) || path.Contains('\0'))
{
throw new ArgumentException(string.Format(SR.Clipboard_InvalidPath, path, nameof(filePaths)));
}
}
SetDataObject(new DataObject(DataFormats.FileDropConstant, autoConvert: true, filePathsArray), copy: true);
}
/// <summary>
/// Clears the Clipboard and then adds an <see cref="Image"/> in the <see cref="DataFormats.Bitmap"/> format.
/// </summary>
public static void SetImage(Image image) =>
SetDataObject(new DataObject(DataFormats.BitmapConstant, autoConvert: true, image.OrThrowIfNull()), copy: true);
/// <summary>
/// Clears the Clipboard and then adds text data in the <see cref="TextDataFormat.UnicodeText"/> format.
/// </summary>
public static void SetText(string text) => SetText(text, TextDataFormat.UnicodeText);
/// <summary>
/// Clears the Clipboard and then adds text data in the format indicated by the specified
/// <see cref="TextDataFormat"/> value.
/// </summary>
public static void SetText(string text, TextDataFormat format)
{
text.ThrowIfNullOrEmpty();
SourceGenerated.EnumValidator.Validate(format, nameof(format));
SetDataObject(new DataObject(ConvertToDataFormats(format), text), copy: true);
}
private static string ConvertToDataFormats(TextDataFormat format) => format switch
{
TextDataFormat.Text => DataFormats.Text,
TextDataFormat.UnicodeText => DataFormats.UnicodeText,
TextDataFormat.Rtf => DataFormats.Rtf,
TextDataFormat.Html => DataFormats.Html,
TextDataFormat.CommaSeparatedValue => DataFormats.CommaSeparatedValue,
_ => DataFormats.UnicodeText,
};
}
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