The value-type variables can be assigned a value directly. These are derived from the class System.ValueType. The value types directly contain data. If you declare an int type, the system allocates memory to store the value.

The Value Type variables are stored in the stack.

These are examples like :-

which stores numbers, alphabets, and floating point numbers, respectively. 

Reference Type 

That refers to a memory location. The using multiple variables, the reference types can refer to a memory location. When the data in the memory location is changed by one of the variables, the other variable automatically reflects this change in value.

The Reference Type variables are stored in the heap.

Example of built-in reference types are −