Marshal.GetLastSystemError Method    
Definition
Important
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Gets the last system error on the current thread.
public:
 static int GetLastSystemError();public static int GetLastSystemError();static member GetLastSystemError : unit -> intPublic Shared Function GetLastSystemError () As IntegerReturns
The last system error.
Remarks
The system error is based on the current operating system—that is, errno on non-Windows and GetLastError on Windows.
This method is provided as a low-level API to allow getting the current system error in a cross-platform manner. It is not tied to platform invoke usage. To get the last platform invoke error, use GetLastPInvokeError.