Regarding explicit interface implementation

Question

Hello Folks,

I was exploring the explicit interface implementation and got a question.

 

In the example below  public void ITest.TestMethod() gives error however void ITest.TestMethod() works.

May I know the reason? 

 

 interface ITest

{

void TestMethod();

}

 

class TestClass: ITest

{

//public void ITest.TestMethod() //Error The modifier 'public' is not valid for this item

 void ITest.TestMethod() //Works

{

Console.WriteLine("Explicit Interface Implementation");

}

}