validate textbox if empty and if number entered
<pre><code>private void btnsave_Click(object sender, EventArgs e)
{
   if (txtfname.Text == "" )
   {
      MessageBox.Show("Please enter your First Name");
      txtfname.Focus();
   }
}
</code></pre>

<p>I want to validate a textbox such that a person cannot leave it blank nor can they add numbers.  Do I have to write an "else if" statement or is there any operator that I can use to put it all in the same if statement.</p>
