windows form .. console.writeline() where is console?

Question

I created a windows form solution and in the constructor of a class I called

Console.WriteLine(\"constructer called\")

But I only got the form

Answer 1

As other answers have stated System.Diagnostics.Debug.WriteLine is the right call for debugging messages. But to answer your question:

From a Winforms application you can invoke a console window for interaction like this:

using System.Runtime.InteropServices;

...

void MyConsoleHandler()
{
    if (AllocConsole())
    {
        Console.Out.WriteLine("Input some text here: ");
        string UserInput = Console.In.ReadLine();

        FreeConsole();
    }
}


[DllImport("kernel32.dll", SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool AllocConsole();

[DllImport("kernel32.dll", SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool FreeConsole();

I sometimes use this to raise a command prompt instead of application windows when given certain switches on opening.

There's some more ideas in this similar question if anyone needs it:
What is the Purpose of Console.WriteLine() in Winforms