The exception that is thrown when the key specified for accessing an element in a collection does not match any key in the collection.
Assembly: mscorlib (in mscorlib.dll)
A is thrown when an operation attempts to retrieve an element from a collection using a key that does not exist in that collection.
uses the HRESULT COR_E_KEYNOTFOUND, which has the value 0x80131577.
For a list of initial property values for an instance of the class, see the KeyNotFoundException constructors.
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune
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.