What is the Difference Between an Interface and an Abstract Class

	Abstract Class	Interface
1	Abstract Class can contains fields, static members, constants, Readonly, Virtual members.	Interface cannot contains fields, static members, constants, Readonly, Virtual members.
2	Abstract Class can contain zero or more abstract methods	Interface should contain at least  one abstract method.
3	Abstract Class can contain zero or more Non abstract methods.	Interface cannot contain Non abstract methods.
4	By default Access modifiers are private.	By default Access modifiers are Public.
5	Once you created abstract method in Base Class , that method should implemented in derived class by using Override keyword.	Once you created abstract method in Interface, that method should implemented in derived class without using Override keyword.
6	Abstract class can contains Constructors.	Interface cannot contains Constructors.