interface as argument or generic method with where - what is the difference?

Question

Is any difference between :

public void Method1(class1 c, T obj) where T:Imyinterface

And

public void Method2(clas         


        

Answer 1

Using a generic method gives you various possibilities with slight signature changes:

1. public void Method1(class1 c, T obj) where T:Imyinterface, new():
   This allows to instantiate new instances of type T.
2. public T Method1(class1 c, T obj) where T:Imyinterface:
   This allows you to use the method without casting it's return value when needed.
3. public void Method1(class1 c, ref T obj) where T:Imyinterface:
   This allows you to assing a new value to obj's reference. Same applies to out.

These are impossible with the non generic version.