Event '<eventname>' implicitly declares '<membername>', which conflicts with a member in the base <type> '<classname>', and so the event should be declared 'Shadows'
An event is declared with a name that combines to form an implicit member with the same name as a member of the base class. For example, if you declare an event named Event1, the compiler generates the implicit procedures add_Event1 and remove_Event1. If the base class has a member with one of these names, the event in this class should shadow the base class member.
This message is a warning. Shadows is assumed by default. For more information about hiding warnings or treating warnings as errors, see Configuring Warnings in Visual Basic.
Error ID: BC40012
To correct this error
To hide the base class member, add the Shadows keyword to the event declaration.
If you do not intend to hide the base class member, change the name of the event.