How to Bind to window's close button the X-button

Question

How I can bind one of my buttons on control to X Button that closes the window ? I just want to create cancel button that just closes the window. I am using MVVM in my code.

Answer 1

MVVM solution without code-behind could also look like this:

View:

ViewModel:

public ICommand CloseWindowCommand
{
    get
    {
        return new RelayCommand(SystemCommands.CloseWindow);
    }
}

But SystemCommands is from .net-4.5 so if you rock in some older version of .net you can also use following.

public ICommand CloseWindowCommand
{
    get
    {
        return new RelayCommand((window) => window.Close());
    }
}