title: Confusing error when splitting a string
body: <p>I have this line of code:</p>
  
  <p><code>string[] ids = Request.Params["service"].Split(",");</code></p>
  
  <p>the values in <code>Request.Params["service"]</code> are: <code>"1,2"</code></p>
  
  <p>Why am I getting:</p>
  
  <pre><code>Error   1   The best overloaded method match for 'string.Split(params char[])' has some invalid arguments
  Error   2   Argument 1: cannot convert from 'string' to 'char[]'
  </code></pre>
  
  <p>This makes no sense to me....</p>
  
  <p>The error happens on everything to the right of the equal sign</p>