C# and method hiding

Question

Per MSDN, the \"new\" keyword when used for method hiding only suppresses a warning.

http://msdn.microsoft.com/en-us/library/435f1dw2.aspx

Do I really need

Answer 1

As far as I know, the only difference is the one you suggest: new hides the warning. I tried out the following code:

class Base
{
    public void Test(){}
}

class ChildA : Base
{
    public void Test(){}
}


class ChildB : Base
{
    public new void Test(){}
}

The test method for both classes look identical in IL:

.method public hidebysig instance void  Test() cil managed
{
  // Code size       1 (0x1)
  .maxstack  8
  IL_0000:  ret
} // end of method ChildA::Test

.method public hidebysig instance void  Test() cil managed
{
  // Code size       1 (0x1)
  .maxstack  8
  IL_0000:  ret
} // end of method ChildB::Test

The compiler issued a warning for Test in ClassA, but not in ClassB. But as other answers has stated; don't confuse the concepts of method hiding and method overriding; not the same thing.