There are the two types of data types available in .NET:
Value type - Refers to
the data type that contains the data. In other words, the exact value or the
data is directly stored in this data type. It means that when you assign a
value type variable to another variable, then it copies the value rather than
copying the reference of that variable. When you create a value type variable,
a single space in memory is allocated to store the value (stack memory).
Primitive data types, such as int, float, and char are examples of value type
Reference type - Refers to a data type that can access data by reference.
Reference is a value or an address that accesses a particular data by address,
which is stored elsewhere in memory (heap memory). You can say that reference
is the physical address of data, where the data is stored in memory or in the
storage device. Some built-in reference types variables in .Net are string,
array, and object.