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Since multiple inheritance is bad (it makes the source more complicated) C# does not provide such a pattern directly. But sometimes it would be helpful to have this ability. For instance I'm able to implement the missing multiple inheritance pattern using interfaces and three classes like that: public interface IFirst { void FirstMethod(); } public interface ISecond { void SecondMethod(); } public class First:IFirst { public void FirstMethod() { Console.WriteLine("First"); } } public class Second:ISecond { public void SecondMethod() { Console.WriteLine("Second"); } } public class FirstAndSecond: IFirst, ISecond { First first = new First(); Second second = new Second(); public void FirstMethod() { first.FirstMethod(); } public void SecondMethod() { second.SecondMethod(); } } Every time I add a method to one of the interfaces I need to change the class FirstAndSecond as well. Is there a way to inject multiple existing classes into one new class like it is possible in C++? Maybe there is a solution using some kind of code generation? Or it may look like this (imaginary c# syntax): public class FirstAndSecond: IFirst from First, ISecond from Second { } So that there won't be a need to update the class FirstAndSecond when I modify one of the interfaces. EDIT Maybe it would be better to consider a practical example: You have an existing class (e.g. a text based TCP client based on ITextTcpClient) which you do already use at different locations inside your project. Now you feel the need to create a component of your class to be easy accessible for windows forms developers. As far as I know you currently have two ways to do this: Write a new class that is inherited from components and implements the interface of the TextTcpClient class using an instance of the class

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