title: Page, Frame, Navigation windows in C# WPF
body: <ul>
  <li>I would like to know the difference between page, frame, navigation windows in c# wpf</li>
  <li>what is the best choice of them for wpf windows application?</li>
  <li>in my application how to make fixed part (contain main buttons) and changeable part (show  pages) after clicking buttons in fixed part</li>
  <li>are there any good websites provides video tutorials for c# wpf from beginning to professional?</li>
  </ul>
  
  <p>thank you</p>