interface interview question

public interface IFirst { void oneMethod(); }
public interface ISecond { void oneMethod(); }
public class:IFirst,ISecond
{
  // I want implement those methods here.how is it?
}

public class myclass:IFirst,ISecond
{
  // I want implement those methods here.how is it?

public void IFirst.oneMethod
{
//do something
}
public void ISecond.oneMethod
{
// do something
}


//call the method like this

IFirst obj=new myclass();
ISecond obj1=new myclass();
obj.oneMethod();
obj1.oneMethod();


}