title: Accessing CustomProperties on Worksheet with Name
body: <p>I'm trying to access a custom property on a worksheet by using the name of the property, but it seems this is not supported (at least not in C#, I saw others reporting that it works in VB and documentation also says so). Can someone confirm that this is not working in C#? Here is example code:</p>
  
  <pre><code>activeWorkSheet.CustomProperties.Add("Test", 123);
  // Accessing by index works, but by name it doesn't. 
  // The documentation says access by name should be possible
  var works = activeWorkSheet.CustomProperties.Item[1].Value;
  var doenstWork = activeWorkSheet.CustomProperties.Item["Test"].Value;
  </code></pre>
  
  <p>I know that a workaround is just some method that iterates over all the properties and finds the right one, but I would really like to avoid any additional overhead.</p>