Differences between an interface and an abstract class?

Difference Between an Interface and an Abstract class?

Interface	Abstract class
An Interface is used to define methods (have no Body) but not for the implementation.	An Interface abstract class can be used to implement the Methods.
An Interface allows us to use multiple inheritance.	An Abstract Classes does not allows us to use multiple inheritance.
Interfaces are slow.	Abstract classes are fast.
When we have similar classes that will share code use an abstract class.	When we have classes that are nothing to do with one another but share some aspect that they do not share a common ancestor then use an interface.
An Interface cannot implement methods.	An abstract class can implement methods.
An Interface can only inherit from another Interface.	An abstract class can inherit from a class and one or more interfaces
An Interface cannot contain fields.	An abstract class can contain fields.
An Interface can contain property definitions.	An abstract class can implement a property.
An Interface cannot contain constructors or destructors.	An abstract class can contain constructors or destructors.
An Interface can be inherited from by structures.	An abstract class cannot be inherited from by structures.
An Interface can support multiple inheritances.	An abstract class cannot support multiple inheritances.