Here are our two golden rules:

1. A Reference Type always goes on the Heap; easy enough, right?
   
2. Value type always goes on the  Stack.

 

Value Types:

In C#, all the “things” declared with the following list of type declarations are Value types (because they are from System.ValueType):

• bool
• byte
• char
• decimal
• double
• enum
• float
• int
• long
• sbyte
• short
• struct
• uint
• ulong
• ushort

Reference Types:

All the “things” declared with the types in this list are Reference types (and inherit from System.Object, except, of course, for object which is the System.Object object):

• class
• interface
• delegate
• object
• string