title: Regular Expression: single word
body: <p>I want to check in a C# program, if a user input is a single word. The word my only have characters A-Z and a-z. No spaces or other characters.
  I try <code>[A-Za-z]*</code> , but this doesn't work. What is wrong with this expression?</p>
  
  <pre><code>Regex regex = new Regex("[A-Za-z]*");
  if (!regex.IsMatch(userinput);)
  {
    ...
  }
  </code></pre>
  
  <p>Can you recomend website with a comprensiv list of regex examples?!</p>