Question

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Which is best for data store Struct/Classes?

Consider the example where I have an Employee object with attributes like age, name, gender, title, salary. I now have a list i want to populate with a bunch of Employees (each Employee instance is unique).

In terms of just speed and memory footprint, is it more preferable to create the employee as a Struct or a Class?

Any additional caveats regarding Struct vs Class in the above scenario are welcome

Answer 1

Structs are to be used only for relatively small structures that should have value-like behaviour.

• Class and struct differences
• Choosing Between Classes and Structures

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.

Your type breaks the first two guidelines, and probably also the third. So you should definitely use a class here.