How to call explicit interface implementation methods internally without explicit casting?

Question

If I have

public class AImplementation:IAInterface {    void IAInterface.AInterfaceMethod()    {    }     void AnotherMethod()    {       ((IAInterface)this).AInterfaceMethod();    } } 

How to call AInterfaceMethod() from AnotherMethod() without explicit casting?

Answer 1

A number of answers say that you cannot. They are incorrect. There are lots of ways of doing this without using the cast operator.

Technique #1: Use "as" operator instead of cast operator.

void AnotherMethod()    {           (this as IAInterface).AInterfaceMethod();  // no cast here } 

Technique #2: use an implicit conversion via a local variable.

void AnotherMethod()    {           IAInterface ia = this;     ia.AInterfaceMethod();  // no cast here either } 

Technique #3: write an extension method:

static class Extensions {     public static void DoIt(this IAInterface ia)     {         ia.AInterfaceMethod(); // no cast here!     } } ... void AnotherMethod()    {           this.DoIt();  // no cast here either! } 

Technique #4: Introduce a helper:

private IAInterface AsIA => this; void AnotherMethod()    {           this.AsIA.IAInterfaceMethod();  // no casts here! } 

Answer 2

You can introduce a helper private property:

private IAInterface IAInterface => this;  void IAInterface.AInterfaceMethod() { }  void AnotherMethod() {    IAInterface.AInterfaceMethod(); }