System.ConsolePal.GetStandardFile C# (CSharp) Méthode

        private static Stream GetStandardFile(int handleType, FileAccess access)
        {
            IntPtr handle = Interop.Kernel32.GetStdHandle(handleType);

            // If someone launches a managed process via CreateProcess, stdout,
            // stderr, & stdin could independently be set to INVALID_HANDLE_VALUE.
            // Additionally they might use 0 as an invalid handle.  We also need to
            // ensure that if the handle is meant to be writable it actually is.
            if (handle == IntPtr.Zero || handle == s_InvalidHandleValue ||
                (access != FileAccess.Read && !ConsoleHandleIsWritable(handle)))
            {
                return Stream.Null;
            }

            return new WindowsConsoleStream(handle, access, GetUseFileAPIs(handleType));
        }