Why do we need struct? (C#)

Question

To use a struct, we need to instantiate the struct and use it just like a class. Then why don\'t we just create a class in the first place?

Answer 1

One of the main reasons is that, when used as local variables during a method call, structs are allocated on the stack.

Stack allocation is cheap, but the big difference is that de-allocation is also very cheap. In this situation, the garbage collector doesn't have to track structs -- they're removed when returning from the method that allocated them when the stack frame is popped.

• edit - clarified my post re: Jon Skeet's comment.