Gets the security identifier (SID) for the user.
Assembly: mscorlib (in mscorlib.dll)
The SID uniquely identifies a user or group on all Windows NT implementations.
The WindowsIdentity object returned by the GetAnonymous method is not the same as the Windows anonymous user. This property gets null for an anonymous user represented by the WindowsIdentity object returned by the GetAnonymous method; it does not get the SID representing an anonymous Windows user.
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.