Question

I have a method which returns different types of instances (classes):

public [What Here?] GetAnything()
{
     Hello hello = new Hello();
     Computer computer = new Computer();
     Radio radio = new Radio();

     return radio; or return computer; or return hello //should be possible?!      
}

How can I do this and later work with the variables, e.g. radio.Play(), etc?

Do I need to use generics, and if so, how?

Answer 1

If there is no common base-type or interface, then public object GetAnything() {...} – but it would usually be preferable to have some kind of abstraction such as a common interface. For example if Hello, Computer and Radio all implemented IFoo, then it could return an IFoo.