title: Part of text with different color in windows phone 8.1
body: <p>I am creating a windows phone 8.1 app where app provides the user with a text box. I want to highlight all the hashtags used in the textbox with different color.
  So as soon as user presses hash(#) on the screen, font color will change till user presses a space key.
  For example, user enters:</p>
  
  <pre><code>This is a #sample statement.
  </code></pre>
  
  <p>Font color remains black for the part of text "This is a", but as soon as user presses # key, color changes to red (including the hash itself) and all subsequent characters are in red colored font.
  So #sample appears in read color. Once user presses a space after the word sample, font color changes back to black and all the remaining text appears to be in black color.
  How can I achieve this? I tried changing the font color but then it changes for the entire text and not just for the hashtag.</p>