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Interface declaration

Rajakulai Setty

Hi All,

I need some general clarification regarding Interface template, like below

 public interface ISomeInterface

    string Id { get; set; }

    string Name { get; set; }

    ISomeInterface WorkerInstance();

In the above code they used method return type as interface in same interface declaration. Am not sure why they coded like this. Please share your comments

1 Reply

Know the answer? Post it — somebody with the same question will find it here.

Pranay Rana11y ago
its basically says the return type is always going to be of sub type of interface type and it provide flexibility. basically it abstract return type and you dont want to expose your actual implementation to the user of your class (Specially when you expose your code as libarary). this helpful because you can extend your inteface easily than class concrete implementation.

example

interface IA
{
IA methodA();
}

public class A : IA
{
public IA methodA()
{
var A = new A();
return A;
}
}

Best answer for this : http://stackoverflow.com/questions/400135/c-sharp-listt-or-ilistt
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