Return an object from a popup window

Question

I have a Window which pop-ups another Window. I want the second Window to be able to return an object to the first Window when a button is pressed. How would I do this?

Answer 1

If you don't want to expose a property, and you want to make the usage a little more explicit, you can overload ShowDialog:

public DialogResult ShowDialog(out MyObject result)
{
   DialogResult dr = ShowDialog();
   result = (dr == DialogResult.Cancel) 
      ? null 
      : MyObjectInstance;
   return dr;
}