title: how to add tab item in one user control from another window + WPF
body: <p>I have one Parent window WMain, with a UserControl(Dashboard) inside a Stackpanel. In the Dashboard, I am have a Tabcontrol which will be populated on a button Click of a Button in the same Dashboard. The TabItem for Dashboard is another UserControl (uscEstimate). I am populating the TabControl with the below mentioned code</p>
  
  <pre><code>        TabItem Tab = new TabItem();
          Tab.Header = est;
          tbcMain.Items.Add(Tab);
          uscEstimate estimate = new uscEstimate();
          Tab.Content = new uscEstimate();
          Tab.Focus();
  </code></pre>
  
  <p>It is working fine. I want to add another TabItem into Dashboard on Button click of Estimate Usercontrol. Is there are way to create a TabItem of Parent UserControl from Child. </p>