Abstract class inheritance

Question

Why a class can inherit only one abstract class ?

vipin kv · Answer

@ Srikanth Reddy Interfaces can solve this issue. Interfaces have Implicit Implementation and Explicit Implementation( Can provide the Interface name to distinguish which Interface method is implementing) . Please find a sample below from this we will get a clear picture. interface IFirst { void GetData(); } interface ISecond { void GetData(); } public class Derived : IFirst ISecond { // Explicit Implementation void IFirst.GetData() { Console.WriteLine(Data from IFirst implementation); } // Explicit Implementation void ISecond.GetData() { Console.WriteLine(Data from ISecond implementation); } // Implicit Implementation public void GetData() { Console.WriteLine(Data from implementation); } } static void Main(string[] args) { Derived obj = new Derived(); obj.GetData(); (obj as IFirst).GetData(); (obj as ISecond).GetData(); }

vipin kv · Answer

@ Srikanth Reddy Yes you are right.

vipin kv · Answer

@ Ravi Kiran No problem bro :)

Srikanth Reddy · Answer

@vipin kv. So you mean to say that from your example explicit implementation is not possible in abstraction. is that statement correct ? Only because of that its possible in Interface and not possible in abstraction. Is this right statement ?

Ravi Kiran Chanduri · Answer

@vipin  Cool man  my post is not pointing you at all. I said casually ... When I was posting I haven't seen any reply to this question

Srikanth Reddy · Answer

@vipin kv. So as because of daimond problem you mean to say that it is not possible in abstract class ? How an interface can overcome this daimond problem ? What makes such differences ?

vipin kv · Answer

Ravi Kiran . If you know these details that's fine but no need to say like 'we all know very well that'.I just share an info that's all if it's useful for anyone it's good that's all. And I am sure that I didn't provide any wrong Information. We also know the definition of Abstract class also so what's the difference !!!

Ravi Kiran Chanduri · Answer

We know multiple inheritance is not possible in c#. An abstract class is similar to a class except for the capability of creating an object due to its protection level( as it is contains protected constructor). So if you try to inherit multiple abstract classes  it means you are trying to inherit multiple classes which are not possible in c# .

vipin kv · Answer

Multiple inheritance is not allowed by C# but it is allowed by C++ but it have problem called Diamond Problem(Appearance of same method exists on multiple base classes on derived class). If we really need Multiple inheritance we can use Interface for the same.