title: Set selected item in WPF ComboBox
body: <p>(I've read similar posts but they all had a twist to them that made the solution different)</p>
  
  <p>I'm porting a WinForms app that used this:</p>
  
  <pre><code>myComboBox.SetSelected(myComboBox.FindString("Some Text"), true);
  </code></pre>
  
  <p>to select an item programmatically. When porting over to WPF, I tried this but it has no effect (the item does not get selected):</p>
  
  <pre><code>myComboBox.SelectedItem = myComboBox.FindName("Some Text");
  </code></pre>
  
  <p>What is the correct way to select an existing item in a ComboBox, in WPF?</p>