title: Controls.RichTextBox vs. Forms.RichTextBox
body: <p>In my Project i currently need a RichTextBox control for highlighting some Text whilst editing it (some kind of Syntax highlighting). </p>
  
  <p>What I tried was to put a System.Windows.Controls.FlowDocument in a RichTextBox. But There are two of them! </p>
  
  <p>One (Windows.Forms.<em>) can be applied to the form, the other (Windows.Controls.</em>) cannot, but the second one can handle FlowDocuments. </p>
  
  <p>Any hints how to solve my mess?</p>
  
  <p>Other methods, to be able to track a Textblock, and change its formatting depending on user input would be also welcome! </p>