Value Type Vs Reference Type

In .Net any variable / object falls under one of the types Value Type or Reference Type, by default structs are value type and classes are reference type. 

The following are some of the key difference between value type and reference type variables / objects.

All Value Type variables are implicitly derived from System.ValueType

All Reference Type objects are implicitly derived from System.Object

Value Type variables have their own defined memory segment, hence copying from one value type variable to another creates a new memory segment and the values of both the variables are stored separately. Changing the value of one variable does not affect the other.

Reference Type objects share the same memory segment, hence copying from one reference type object to another just adds a pointer and both the objects point to the same base memory segment, hence changing the value of one reference type object affects the value of the other.

All Value Type variables are stored in the stack

All Reference Type objects are stored in the heap

Structs are Value Type

Classes are Reference Types