title: How to open a child windows under parent window on menu item click in WPF?
body: <p>I am developing an application in C#. I'm using .Net under WPF. I want to open a new child window (like a dialog) and it should open within the main window, just below the menu bar. </p>
  
  <p>However, the newly opened windows is simply showing an OS task bar. How can I open the various new windows(like a dialog box) under the main window? </p>