Hi,

Why C# alone is not supporting Multiple Inheritance, when we are able to achieve same thing in C++/Java.

Can anybody explain with a good example?

Ramkumar

A.D.Ramkumar

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Ramkumar A D

C# doesn't allow multiple implement inheritance directly; however it does allow multiple interface inheritance. An interface and abstract class are almost exactly the same thing.

Multiple Inheritance (MI) has not been implemented for the following reasons:

1. .NET allows the use of different languages, each of these languages would have different expectations on how MI works. Microsoft has not gotten around to resolving these differences.

2. The number of places where MI is appropriate is very small. Most often Multiple Interface Inheritance can get the job done.

3. MI injects a lot of complexity into the implementation.

For a more complete overview see: http://blogs.msdn.com/csharpfaq/arch.../07/85562.aspx

- A.Kahtava

Simulated Multiple Inheritance Pattern for C#: http://www.codeproject.com/csharp/smip.asp

- A.Kahtava

Java like C# was designed without multiple implementation inheritance; however both languages provide multiple interface inheritance.

Out of your list of languages, C++ is the only language that supports both types of multiple inheritance.

"The one indisputable fact about multiple inheritance in C++ is that it opens up a Pandora’s box of complexities that simply do not exist under single inheritance." - Scott Meyers

Single interface inheritance can accomplish much the same as both interface and implementation inheritance.
Came across that quote today, thought it was suiting.

- Adam Kahtava [http://adam.kahtava.com]

Hi,

If some body can explain me with practical scenario, it will be far better.

Expecting for your reply.

Ramkumar A.D.

A.D.Ramkumar

Can I rephrase your question?
Can you give a practical example of when you would want to use multiple inheritance?

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Joe (Microsoft MVP - XML)