Abstract Class vs. Interface in C#

Abstract Class	Interface
abstract classes are not support multiple inheritance	interface is support multiple inheritance
not allows creating instances	not allows creating instances
Abstract class can contain abstract methods, abstract property as well as other members (just like normal class)	Interface can only contain abstract methods, properties but we don’t need to put abstract and public keyword. All the methods and properties are by default Public.
An abstract class may contain complete or incomplete methods	Interfaces can contain only the signature of a method but no body
abstract class can contain fields, constructors, or destructors and implement properties	An interface cannot contain fields, constructors, or destructors and it has only the property's signature but no implementation
Various access modifiers such as abstract, protected, internal, public, virtual, etc can be used	By default they are public so no need to define