Adds an item to the IList.
Assembly: PresentationCore (in PresentationCore.dll)
private abstract Add : keyFrame:Object -> int private override Add : keyFrame:Object -> int
Return ValueType: System.Int32
The position into which the new element was inserted, or -1 to indicate that the item was not inserted into the collection.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.