This method creates an exception object for the specified failure HRESULT. If the HRESULT is 0 or positive (a success code), the method returns without creating or throwing an exception.

The Marshal.ThrowExceptionForHR(int, IntPtr) method releases the errorInfo parameter, decreasing the COM reference count of the IErrorInfo interface.

Note that the Marshal.ThrowExceptionForHR(int, IntPtr) method returns an exception based on the IErrorInfo interface of the current thread if one is set. When this happens, the errorCode parameter is ignored.

Some failure HRESULTs map to defined exceptions, whereas others do not. If the HRESULT maps to a defined exception, Marshal.ThrowExceptionForHR(int) creates an instance of the exception and throws it. Otherwise, it creates an instance of System.Runtime.InteropServices.COMException, initializes the error code field with the HRESULT, and throws that exception. The errorInfo parameter is used to retrieve extra information regarding the error.

For the mapping from each HRESULT to its comparable exception class in the .NET Framework, see How to: Map HRESULTs and Exceptions.

Namespace: System.Runtime.InteropServices
Assembly: mscorlib (in mscorlib.dll)
Assembly Versions: 1.0.5000.0, 2.0.0.0, 4.0.0.0