如何禁用Console.WriteLine等输出

    class ConsoleOut : TextWriter
    {

        private ConsoleOut(TextWriter output)
        {
            _out = output;
        }

        private TextWriter _out;

        public override Encoding Encoding
        {
            get { return _out.Encoding; }
        }

        public override void Write(char value)
        {
            if (__outputEnabled)
                _out.Write(value);
        }

        private static ConsoleOut __instance;

        public static void Install()
        {
            if (__instance == null)
            {
                __instance = new ConsoleOut(Console.Out);
                Console.SetOut(__instance);
            }
        }

        private static bool __outputEnabled;

        public static bool OutputEnabled
        {
            get { return __outputEnabled; }
            set { __outputEnabled = value; }
        }
        
    }

            // 调用示范
            ConsoleOut.Install();

            Console.WriteLine("这行不会输出");
            ConsoleOut.OutputEnabled = true;
            Console.WriteLine("这行可以输出");
            ConsoleOut.OutputEnabled = false;
            Console.WriteLine("这行也不会输出");