Inserts an item into the IList at the specified index.
index is not a valid index in the IList.
value is of a type that is not assignable to the IList.
If index equals the number of items in the IList, then value is appended to the end.
This method is an O(n) operation, where n is Count.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2