[This documentation is for preview only, and is subject to change in later releases. Blank topics are included as placeholders.]
This API supports the .NET Framework infrastructure and is not intended to be used directly from your code.
Determines the index of a specific item in the collection.
Assembly: PresentationFramework (in PresentationFramework.dll)
Windows 8 Consumer Preview, Windows Server 8 Beta, Windows 7, Windows Server 2008 SP2, Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)