System.Runtime.InteropServices.MarshalTests.GetHRForException C# (CSharp) Method

        public static void GetHRForException()
        {
            Exception e = new Exception();

            try
            {
                Assert.Equal(0, Marshal.GetHRForException(null));
                
                Assert.InRange(Marshal.GetHRForException(e), int.MinValue, -1);            
                Assert.Equal(e.HResult, Marshal.GetHRForException(e));
            }
            finally
            {
                // This GetExceptionForHR call is needed to 'eat' the IErrorInfo put to TLS by 
                // Marshal.GetHRForException call above. Otherwise other Marshal.GetExceptionForHR 
                // calls would randomly return previous exception objects passed to 
                // Marshal.GetHRForException.
                // The correct way is to use Marshal.GetHRForException at interop boundary only, but for the
                // time being we'll keep this code as-is.
                Marshal.GetExceptionForHR(e.HResult);
            }
        }