title: Conventions for naming a class containg common methods used in all application
body: <p>I have Xamarin.Android application with 8 activities. In each activity I create 2,3 or more methods which has nothing in common for example in my <code>SynchronizationActivity</code> I have created two methods <code>UnzipFile</code> and <code>ImportXMLFileIntoDatabase</code> in my other activities I have created another methods. I don't want my methods to be in the activity to make it clearer so I want to put all methods my activities use in a single static class as static methods and in the activity I want to use them like that:</p>
  
  <pre><code>Helper.UnzipFile() or Helper.ImportXMLFileIntoDatabase() 
  </code></pre>
  
  <p>I cave created the Helper class in a folder named CommonMethods. Can someone think of better name for class and folder and is there any C# naming convention for that?</p>