public static class ConsoleManager
{private const string Kernel32_DllName = "kernel32.dll";[DllImport(Kernel32_DllName)]private static extern bool AllocConsole();[DllImport(Kernel32_DllName)]private static extern bool FreeConsole();[DllImport(Kernel32_DllName)]private static extern IntPtr GetConsoleWindow();[DllImport(Kernel32_DllName)]private static extern int GetConsoleOutputCP();public static bool HasConsole{get { return GetConsoleWindow() != IntPtr.Zero; }}/// Creates a new console instance if the process is not attached to a console already.  public static void Show(){#if DEBUG  if (!HasConsole){AllocConsole();InvalidateOutAndError();}#endif  }/// If the process has a console attached to it, it will be detached and no longer visible. Writing to the System.Console is still possible, but no output will be shown.   public static void Hide(){#if DEBUG  if (HasConsole){SetOutAndErrorNull();FreeConsole();}#endif  }public static void Toggle(){if (HasConsole){Hide();}else{Show();}}static void InvalidateOutAndError(){Type type = typeof(System.Console);System.Reflection.FieldInfo _out = type.GetField("_out",System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.NonPublic);System.Reflection.FieldInfo _error = type.GetField("_error",System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.NonPublic);System.Reflection.MethodInfo _InitializeStdOutError = type.GetMethod("InitializeStdOutError",System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.NonPublic);Debug.Assert(_out != null);Debug.Assert(_error != null);Debug.Assert(_InitializeStdOutError != null);_out.SetValue(null, null);_error.SetValue(null, null);_InitializeStdOutError.Invoke(null, new object[] { true });}static void SetOutAndErrorNull(){Console.SetOut(TextWriter.Null);Console.SetError(TextWriter.Null);}
}