title: How to check if a char is in the alphabet in C#
body: <p>I think the title says enough.</p>
  
  <pre><code>void onClickSubmit(char submit)
  {
       if(submit.//check if it is alphabetical)
       {
             //some code
       }
  }
  </code></pre>
  
  <p>how can i check if the char submit is in the alphabet?</p>