title: Removing a character from my stringbuilder
body: <p>I am having the following string builder as msrtResult, which is quite long:</p>
  
  <pre><code>mstrResult.Append(rtbResult.Text).Append("})})" + Environment.NewLine)
  </code></pre>
  
  <p>How can I remove the last "," from mstrResult Now? (it is in the middle of that mstrResult and it is not the last character of the whole string since I am appending strings to it)
  I should do it before adding the newline. 
  Thanks</p>