c# interface

public interface IA
{
     void Member(string str);
}
public interface IB
{
     void Member(string str);
}
public class TestInterface:IA,IB
{
     public void Member(string str)
     {
         //to do....
     }
}
//new override base interface member.....
interface IA
{
    void Member();
}
interface IB:IA
{
    new void Member();
}
//1:分别显式实现
public class TestInterface:IB
{
    void IA.Member()
    {
         //to do....
    }
    void IB.Member()
    {
         //to do...
    }
}
//2:隐式实现A.Member()
public class TestInterface:IB
{
    void Member()
    {
         //to do....
    }
    void IB.Member()
    {
         //to do...
    }
}
//3:隐式实现B.Member()
public class TestInterface:IB
{
    void IA.Member()
    {
         //to do....
    }
    void Member()
    {
         //to do...
    }
}