How to call a particular explicitly declared interface method in C#

Question

I have a doubt on how to call the method of particular interface (Say IA or IB or In...) in the following code. Please help me on how to call. I have commented the lines of

Answer 1

The method that will be called depends on the type that calls it. For example:

Note, for sake of clarity, I create two items. In practice though, you don't want to do this, you should just cast the object between types.

static void Main(string[] args)
{
    // easy to understand version:
    IA a = new Model();
    IB b = new Model();

    a.Display();
    b.Display();

    // better practice version:
    Model model = new Model();

    (IA)model.Display();
    (IB)model.Display();
}

interface IA
{
    void Display();
}

interface IB
{
    void Display();
}

class Model : IA, IB
{
    void IA.Display()
    {
        Debug.WriteLine("I am from A");
    }

    void IB.Display()
    {
        Debug.WriteLine("I am from B");
    }            
}

Outputs:

I am from A
I am from B