Types and variables

There are two kinds of types in C#:

• value types
• reference types.

Variables of value types directly contain their data.

Variables of value types have their own copy of the data.

Variables of reference types store references to their data(objects).

Variables of reference types may reference the same object.

C#'s value types includes:

• simple types
• enum types
• struct types
• nullable types

C#'s reference types are:

• class types
• interface types
• array types
• delegate types.

The following table lists the concrete types and their group names: