VB -> C#: Don't generate unnecessary properties for WithEvents field

[GrahamTheCoder]

Is your feature request related to a problem? Please describe.
In order to convert a WithEvents field, the converter turns it into a property with a backing field (as the VB compiler also does).
If the field is only internally visible and has no Handles methods, this is redundant, and non-idiomatic C#.

Describe the solution you'd like
Use the field directly in the case described.

Describe alternatives you've considered
Leave it as it is now for consistency and simplicity of implementation

Additional context
It surprised someone in its current state, which is usually a bad sign:
#569 (comment)

[FrancisVerreault]

I just experienced it on a very big project. Every component have been updated with an underscore at the begining of the name to let the original name for the getter/setter. It also added renames in the codes so yep there should be an option to choose if you want generated getter and setter.