FrameworkRichTextComposition Class
Represents a composition related to text input. You can use this class to find the text position of the composition or the result string.
Assembly: PresentationFramework (in PresentationFramework.dll)
This class is used for parameters of text input events (i.e. TextInputStart, TextInputUpdate, etc) on RichTextBox.
System.Windows.Threading.DispatcherObject
System.Windows.Input.TextComposition
System.Windows.Documents.FrameworkTextComposition
System.Windows.Documents.FrameworkRichTextComposition
Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.