Constructor or destructor inheritance is explicit.. Public Extended : base()à this is called the constructor initializer.

An abstract class may contain code in method bodies, which is not allowed in an interface. Java does not allow inheritance from multiple classes. On the other hand, you can implement multiple interfaces in your class. Also, an abstract class can contain private and protected members, and non-static member variables.

An abstract class may contain code in method bodies, which is not allowed in an interface. Java does not allow inheritance from multiple classes. On the other hand, you can implement multiple interfaces in your class. Also, an abstract class can contain private and protected members, and non-static member variables.

In PHP an extended class is always dependent on a single base class, that is, multiple inheritance is not supported. Classes are extended using the keyword 'extends'.

A struct is a value type while a class is a reference type. There's no inheritance with struct.

In software engineering the concept of abstraction is extremely important. Microsoft calls its own language abstraction layer the Common Intermediate Language (CIL). Similar to byte code like Java generates IL supports all object oriented features including data abstraction, inheritance, polymorphism, etc. In addition to these features IL supports other concepts such as properties, fields and enumeration. Any .net language can be converted into IL, so .net supports multiple languages and perhaps multiple platforms. CIL is also called as MSIL (Microsoft Intermediate Language). When .net code is compiled it is converted into IL, which is then executed. Because of IL objects created in one language can be accessed and derived from another. E.g. it is possible to create a class in VB.Net and derive from it in C#.