C # Keyword Usage virtual + override VS New

A Simple case:

 public  class   foo{ public  /*  virtual  */ bool  DoSomething () {return  ; }}  public  class   bar:foo{ public  /*  override or new  */ bool  DoSomething () {return  ; }}

Call the code like this:

New Bar (); a.dosomething ();

Note:the important thing Bar is, and we object is actually a and we are storing it in a variable of type Foo (this was similar to casting it)

Explain:

New keyword is for hiding. -means you is hiding your method at runtime. Output would be based base class method.

Override for overriding. -means you is invoking your derived class method with the reference of base class. Output'll is based on derived class method.

Check out the following link for more discussion:

Http://stackoverflow.com/questions/159978/c-sharp-keyword-usage-virtualoverride-vs-new

C # Keyword Usage virtual + override VS New