Question

There is a design problem like this.

Suppose you have a set of class that implements similar methods but not identical ones.

Example : The ClassA has methods like this.

void Add(string str);
void Delete(string str);
List<string> GetInfo(string name);

Another class, ClassB has the following methods.

void Add(Dictionary Info);
void Delete(string str);
Dictionary GetInfo(string name);

So the nature of the methods are similar but the return types/ input parameters are different. If I develop an interface to keep the consistency I can only define Delete operation there. Alternatively I can think about a set of independant class without any relationships with each other (Of course no interface implementations) but I don’t think it is a good design.

1. What is the approach I can use to implement this?
2. I am new to generic interfaces. Does it help in this case? If so I am going to learn and implement using them.

Answer 1

You can use generic interface here. An example:

interface IModifiable<T>
{
  void Add(T Info);
  void Delete(T item);
  T GetInfo(string name);
}
public class MyClass : IModifiable<List<string>>
{
   public void Add(List<string> list)
   { 
      //do something
   }

   public void Delete(List<string> item)   {  }
   public List<string> GetInfo(string name)  {  }
}