Assembly: mscorlib (in mscorlib.dll)
The registry key is closed. Closed keys cannot be accessed.
The user does not have the necessary registry rights.
A system error occurred, such as deletion of the current key.
The user does not have the permissions required to read the key.
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.