Question

If the object being referenced as a parameter is being modified in a function, does it matter if you use ref or not? Is there a difference between the following two functions?

void DisposeObject(ClassThing c)
{
   c.Dispose();
}

void DisposeObject(ref ClassThing c)
{
   c.Dispose();
}

Answer 1

It doesnt depend in your case.

BUT:

if you pass a reference object with the ref keyword you have inside of the method the possibility to change the reference to point to another Object of this type (so it will be visible outside of the method)