title: Set color of text in a Textbox/Label to Red and make it bold
body: <p>I want a text color to be red in color on certain condition.</p>
  <p>Here is how  i want to get it done.</p>
  <pre><code>string minusvalue = TextBox1.Text.ToString();
  if (Convert.ToDouble(minusvalue) &lt; 0)
  { 
  // set color of text in TextBox1 to red color and bold.
  }
  </code></pre>
  <p>Is there any function that can set the property of text in TextBox?</p>