Use generic event handler instances

Before .NET Framework 2.0, in order to pass custom information to the event handler, a new delegate had to be declared that specified a class that was derived from the System.EventArgs class. In .NET Framework 2.0 and later versions, the generic System.EventHandler`1 delegate allows any class that's derived from System.EventArgs to be used together with the event handler.

A type contains a delegate that returns void and whose signature contains two parameters (the first an object and the second a type that is assignable to EventArgs), and the containing assembly targets .NET.

By default, this rule only looks at externally visible types, but this is configurable.

To fix a violation of this rule, remove the delegate and replace its use by using the System.EventHandler`1 delegate.

If the delegate is autogenerated by the Visual Basic compiler, change the syntax of the event declaration to use the System.EventHandler`1 delegate.

Do not suppress a warning from this rule.