Question

What does -new- keyword mean here?

  class X
  {
        new byte Method ()
        {
              return 5;
        }
  }

I found some on stackoverflow, but I need simpliest answer as possible (poor english).

Answer 1

new hides the method from the base class:

class Base
{ 
    byte Method () 
    { 
          return 4; 
    } 
} 

class X : Base
{ 
    new byte Method () 
    { 
          return 5; 
    } 
} 

X x = new X();
Base b = x;
Console.WriteLine(x.Method()); // Prints "5"
Console.WriteLine(b.Method()); // Prints "4"

Significantly, if the method is virtual, and you use override instead of new, the behavior is different:

class Base
{ 
    virtual byte Method () 
    { 
          return 4; 
    } 
} 

class X : Base
{ 
    override byte Method () 
    { 
          return 5; 
    } 
} 

X x = new X();
Base b = x;
Console.WriteLine(x.Method()); // Prints "5"
Console.WriteLine(b.Method()); // Prints "5"