title: Line between two TextBlocks and fixing the position of elements
body: <p>I'm new to Visual Studio and WPF applications. I am trying to make XAML GUI for email and now I am stucked.</p>
  
  <p>I created two TextBlocks which are displaying the content of email and now I want to make border between them, something like that:</p>
  
  <p>Some text from message 1</p>
  
  <hr>
  
  <p>Some text from message 2.</p>
  
  <p>Actually I don't want to make full border around whole TextBlock, but just on bottom of the first one, or straight line between first and second (if that is even possible, if not, border all over around will be good too as solution).</p>
  
  <p>Also I want to fix my problem with positions of elements (I have TextBlocks, TreeViews and ListViews). My workspace is Height="400" Width="625", and when I Start my GUI, and drag &amp; resize window I mess up whole text and construction of my GUI.</p>
  
  <p>I hope you are able to help me, if someone does not understand anything in my question, feel free to ask, I will try to explain it more specific.</p>
  
  <p>In addition, thanks a lot!</p>