What is the point of doing this?

  protected override void EndProcessing()
    {
        base.EndProcessing();
    }

What is the point of doing this?

  protected override void EndProcessing()
    {
        base.EndProcessing();
    }

You're simply delegating to the superclass, so there's no sense in overriding the method. You can remove this.

O_O
What is this  ?!

  protected override void EndProcessing()
    {
        base.EndProcessing();
    }

What is the point of doing this?

  protected override void EndProcessing()
    {
        base.EndProcessing();
    }