ThrowExceptionForHR + GetHRForLastWin32Error vs Win32Exception

Question

Are these calls equivalent?

• Marshal.ThrowExceptionForHR(Marshal.GetHRForLastWin32Error());
• throw new Win32Exception();

Answer 1

They are not equivalent.

• Marshal.ThrowExceptionForHR(Marshal.GetHRForLastWin32Error()) throws a COM exception. This could be System.Runtime.InteropServices.COMException or an exception appropriate to the Win32 error code.
• throw new Win32Exception() throws a Win32 exception, System.ComponentModel.Win32Exception.