As you know (and if you don't know, you can read the documentation about it), a class helper is a type that can be associated to a class. When a class helper is associated with another class, all the methods and properties defined in the helper are also available in the other class and in its descendants. Helpers are a way to extend a class without using inheritance. However, it is not the same thing as inheritance. In other words, if the
TFooHelper helper is in the same scope as
TFoo, the compiler's resolution scope then becomes the original type (
TFoo), plus the helper (
TFooHelper). So, if the
TFoo helper defines the
DoSomething method and the helper of
TFoo is used in the same ...