Output Console.WriteLine from WPF Windows Applications to actual console

After digging up a bit, I found this answer. The code is now:

namespace WpfConsoleTest{    public partial class App : Application    {        [DllImport("Kernel32.dll")]        public static extern bool AttachConsole(int processId);        protected override void OnStartup(StartupEventArgs e)        {            AttachConsole(-1);            Console.WriteLine("Start");            System.Threading.Thread.Sleep(1000);            Console.WriteLine("Stop");            Shutdown(0);        }    }}

Calling the exe directly still has a nasty side effect, connected with the call returning immediately:

C:\test>WpfConsoleTest.exeC:\test>StartStop^^^^The cursor will stay here waiting for the user to press enter!

The solution is, once again, to use start:

C:\test>start /wait WpfConsoleTest.exeStartStop

Thanks for input!

What I've done in the past is to make it a console application and call P/Invoke to hide the app's associated Console window once I've shown my WPF Window:

//added using statements per comments...using System.Diagnostics;using System.Runtime.InteropServices;    internal sealed class Win32    {        [DllImport("user32.dll")]        static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);        public static void HideConsoleWindow()        {            IntPtr hWnd = Process.GetCurrentProcess().MainWindowHandle;            if (hWnd != IntPtr.Zero)            {                ShowWindow(hWnd, 0); // 0 = SW_HIDE            }        }    }

A WPF application will not have a console by default, but you can easily create one for it and then write to it just like in a console app. I've used this helper class before:

public class ConsoleHelper{    /// <summary>    /// Allocates a new console for current process.    /// </summary>    [DllImport("kernel32.dll")]    public static extern Boolean AllocConsole();    /// <summary>    /// Frees the console.    /// </summary>    [DllImport("kernel32.dll")]    public static extern Boolean FreeConsole();}

To use this in your example, you should be able to do this:

namespace WpfConsoleTest{    public partial class App : Application    {        protected override void OnStartup(StartupEventArgs e)        {            ConsoleHelper.AllocConsole();             Console.WriteLine("Start");            System.Threading.Thread.Sleep(1000);            Console.WriteLine("Stop");            ConsoleHelper.FreeConsole();            Shutdown(0);        }    }}

And now, if you run it from the command line, you should see "Start" and "Stop" written to the console.