title: Enumerations in C# negative side effects of using a negative number
body: <p>In a C# enumeration, are there any negative side effects of using a negative number?</p>
  
  <p>I am modelling response codes and one of the codes in negative. This compiles but I want to know if there are any negative side effects to this.</p>
  
  <pre><code>public enum ResponseCodes
  {
      InvalidServerUserPasswordCombo = -1,
  
      // etc.
  }
  </code></pre>