Built in Value Type in C#

Built-in value types

Built-in value types are also referred to as simple or primitive value types. Built-in value types, such as System.Int32, are defined in the Common Language Run-time (CLR).  As a result, these value types are the most efficiently managed value types in the .NET Framework. Each built-in type in the .NET Framework is directly mapped to a corresponding primitive type in a programming language.