Class is a collection of fields, properties and methods. It depicts real life entities and is a fundamental concept in Object Oriented Programming. A class is a user-defined blueprint from which objects are created . A class is a user defined data type of reference type. Lets take a example of a Car . It has different attributes like color,maximum speed,no of gears on with a built in audio player and so on. public class Car { private string _color; //a variable and a field with data type string // a variable and a property public string Color { get { return _color; } set { _color= value; ...