What is a Value Class and what is a reference Class in C#?

Question

What is the definition of a value class and reference class in C#?

How does this differ from a value type and reference

Answer 1

Value types are passed by value, while reference types are passed by reference.

Edit: value/reference classes
There is no concept of a 'value class' or 'reference class' in C#, so asking for its definition is moot.