Define Generics

• Generics are similar to ―templates in C++.
•  A generic is an identifier, which automatically identifies the data type of a variable.
•  This is designed to represent a particular data type, during an object life time or a method execution.

 Two types of generics. 

•  Representing a data type during an object life time.
•  Representing a data type during the method execution time.

Define rules of Destructor

• Its name must be defined as class name.
•  It' name must be started with "~" character.
•  Access modifier can‘t be specified for this.
•  No arguments.
•  No return value.
•  Destructor overloading is not possible. That means multiple destructors can't be defined inside of a class.