Question

Could anyone just enlighten me on the main differences in C# between enumerations, structs and classes? I usually just use classes for this type of code but never really seen the need to use the others?

Answer 1

Refering to :

Introduction to Objects and Classes in C# – Introduction

Introduction to Objects and Classes in C# – World’s Classes and Objects

In Object-Oriented Programming
programmers write independent parts of
a program called classes. Each class
represents a part of the program
functionality and these classes can be
assembled to form a program.

In our world we have classes and
objects for those classes. Everything
in our world is considered to be an
object. For example, people are
objects, animals are objects too,
minerals are objects; everything in
the world is an object. Easy, right?
But what about classes?

In our world we have to differentiate
between objects that we are living
with. So we must understand that there
are classifications (this is how they
get the name and the concepts of the
Class) for all of those objects. For
example, I’m an object, David is
object too, Maria is another object.
So we are from a people class (or
type). I have a dog called Ricky so
it’s an object. My friend’s dog, Doby,
is also an object so they are from a
Dogs class (or type).

A Struct is similiar to class with several differences.

Refering to Structs

A struct is a value type. To help
understand the struct, it’s helpful to
make a comparison with classes. While
a struct is a value type, a class is a
reference type. Value types hold
their value in memory where they are
declared, but reference types hold a
reference to an object in memory. If
you copy a struct, C# creates a new
copy of the object and assigns the
copy of the object to a separate
struct instance. However, if you copy
a class, C# creates a new copy of the
reference to the object and assigns
the copy of the reference to the
separate class instance. Structs can’t
have destructors, but classes can have
destructors. Another difference
between a struct and class is that a
struct can’t have implementation
inheritance, but a class can…

Enumerations are essentially unique types that allow you to assign symbolic names to integral values.