How can I make the program window close when I press a key?

Question

C++ / C#

It is necessary that the program closes when you press 'd' and does nothing when you press any other key

Answer 1

Something like this.
У формы есть событие KeyPress и KeyDown.

if(e.KeyChar == 'д')
            {
                Application.Exit();
            }

Или так по событию KeyDown

private void Form1_KeyDown(object sender, KeyEventArgs e)
        {
            if(e.KeyCode == Keys.L)
            {
                Application.Exit();
            }
        }

If for console.

Console

do
        {
           //Тут что надо делать. Или не надо.
        } while (Console.ReadKey().Key != ConsoleKey.L);

Answer 2

Was looking for a method like this. Found, on a stack like...
For WPF.

IntPtr hWnd = CloseThisWindow.FindWindowByCaption(IntPtr.Zero, "НАЗВАНИЕ ОКНА");
            bool ret = CloseThisWindow.CloseWindow(hWnd);