What is the difference between abstract class and interface in c#?

Abstract class

Abstract class not not support multiple inheritance

It contains constructor

An abstract class contains access modifier

Fast execution to find the actual method in the class

in abstract class fields and constraints have defined

An abstract class provides the complete code

Member of the abstract class can be static

 Interface 

Interface support multiple inheritance

It does not contain constructor

an interface not not have any access modifier

Take more time to find the actual method in the class

fields can not be defined in the interface

An interface can not provide any code rather then the signature

member of the static class can not be static