Why Use Explicit Interface Implementation to Handle Conflicting Method Names?

Why Explicit Interface Implementation?

When dealing with multiple interfaces that define the same method, explicit interface implementation ensures that the compiler selects the correct implementation. Consider the scenario where interfaces IDoItFast and IDoItSlow both define a Go() method.

To avoid ambiguity when a class implements both interfaces, explicit implementation is required. In the example below:

public interface IDoItFast
{
    void Go();
}
public interface IDoItSlow
{
    void Go();
}
public class JustDoIt : IDoItFast, IDoItSlow
{
    void IDoItFast.Go()
    {
    }

    void IDoItSlow.Go()
    {
    }
}

By explicitly implementing Go() for each interface, the class JustDoIt can provide separate implementations for each Go() method. This prevents the compiler from selecting a single implementation for both interfaces.

Therefore, explicit interface implementation is essential when you want to provide different implementations for the same method defined in multiple interfaces.

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