struct - what is it for?

Question

I know something about struct type. But I can\'t understand: what is it for? when have I use it? Classes, simple value-types and enums - that\'s all that I need

Answer 1

MSDN provdies a guide : Choosing Between Classes and Structures:

Consider defining a structure instead of a class if instances of the type are small and commonly short-lived or are commonly embedded in other objects.

Do not define a structure unless the type has all of the following characteristics:

• It logically represents a single value, similar to primitive types (integer, double, > and so on).
• It has an instance size smaller than 16 bytes.
• It is immutable.
• It will not have to be boxed frequently.