tl;dr structs have better data locality. Value types add much less pressure for the GC than reference types. But big value types are expensive to copy and you can accidentally box them which is bad. Introduction The .NET framework implements Reference Types and Value Types. C# allows us to define custom value types by using struct and enum keywords. class, delegate and interface are for reference types. Primitive types, like byte, char, short, int and long are value types, but developers can...| adamsitnik.com