The class implementing is the interface that implements all interface methods and there will not be any abstract Class requirement. There are many access modifiers available like abstract, protected, virtual, internal, public and many more that are useful in the abstract CLASSES. Abstract classes will be very fast when compared to interfaces.

Abstract class CONTAINS both the incomplete or complete methods and the interface is the signature for a particular method. The abstract class is the IMPLEMENTED methods but the interface cannot be an implement methods.

The abstract class contains constructors, fields or destructors for implementing the properties. The interface does not CONTAIN constructors, fields or destructors but they have only property’s signature with no implementation.

The abstract class does not support the multiple inheritances and the interface supports multiple inheritances. The class can ALSO inherit more number of interfaces but only a single abstract class.

The class implementing is the interface that implements all interface methods and there will not be any abstract Class requirement. There are many access modifiers available like abstract, protected, virtual, internal, public and many more that are useful in the abstract Classes. Abstract classes will be very fast when compared to interfaces.

Abstract class contains both the incomplete or complete methods and the interface is the signature for a particular method. The abstract class is the implemented methods but the interface cannot be an implement methods.

The abstract class contains constructors, fields or destructors for implementing the properties. The interface does not contain constructors, fields or destructors but they have only property’s signature with no implementation.

The abstract class does not support the multiple inheritances and the interface supports multiple inheritances. The class can also inherit more number of interfaces but only a single abstract class.