Base Obj = new Derived()?

[Akhil]

Hi All,

Can u please explain this.

Base Obj = new Derived(); [Base being the base class and Derived being
the derived the class]

Can Obj access methods both of Base and Derived or what will be the
behaviour?
What will be the behaviour for Overridden Methods?

Cheers,
Akhil

[googou]

Obj only can access methods of base(the Interface of Base ),but the behaviour
of method depend on the Derived(for the Overridden Methods or New
Methods,of couse the behaviour of the other method of Derived is same to
the Base)

hope it helps

"Akhil" wrote:

Hi All,

Can u please explain this.

Base Obj = new Derived(); [Base being the base class and Derived being
the derived the class]

Can Obj access methods both of Base and Derived or what will be the
behaviour?
What will be the behaviour for Overridden Methods?

Cheers,
Akhil

[Akhil]

Thanks, But Not Clear though.
--
Cheers,
Akhil

"googou" <go****@discuss ions.microsoft. com> wrote in message
news:D4******** *************** ***********@mic rosoft.com...

Obj only can access methods of base(the Interface of Base ),but the behaviour of method depend on the Derived(for the Overridden Methods or New
Methods,of couse the behaviour of the other method of Derived is same to the Base)

hope it helps

"Akhil" wrote:

Hi All,

Can u please explain this.

Base Obj = new Derived(); [Base being the base class and Derived being the derived the class]

Can Obj access methods both of Base and Derived or what will be the
behaviour?
What will be the behaviour for Overridden Methods?

Cheers,
Akhil

[Rakesh Rajan]

Since the reference type of obj is Base, you will be able to access only
those members of Base, and not that of Derived. Now, whose members get
invoked depends upon how the derived class has overriden the base members
etc. Unless the Derv have overridden the methods, Base's methods keep getting
called.

"Akhil" wrote:

Hi All,

Can u please explain this.

Base Obj = new Derived(); [Base being the base class and Derived being
the derived the class]

Can Obj access methods both of Base and Derived or what will be the
behaviour?
What will be the behaviour for Overridden Methods?

Cheers,
Akhil

[Rakesh Rajan]

This example might help you understand:
class Class1
{
static void Main(string[] args)
{
Base obj = new Base();
obj.Show();

obj = new Derv();
obj.Show(); // This will invoke Derv's method, as it overrides Base's
method
obj.ShowWithNoV irtual(); // This will invoke Base's method, as the Base's
method is not virtual
//obj.DervMethod( ); This won't work as obj refers to a Base type instance
}

}

public class Base
{
public void ShowWithNoVirtu al()
{
Console.WriteLi ne("Base - no virtual");
}

public virtual void Show()
{
Console.WriteLi ne("Base");
}
}

public class Derv : Base
{
public void DervMethod()
{
}

public new void ShowWithNoVirtu al()
{
Console.WriteLi ne("Derv - no virtual");
}

public override void Show()
{
Console.WriteLi ne("Derv");
}
}

"Akhil" wrote:

Thanks, But Not Clear though.
--
Cheers,
Akhil

"googou" <go****@discuss ions.microsoft. com> wrote in message
news:D4******** *************** ***********@mic rosoft.com...

> Obj only can access methods of base(the Interface of Base ),but the

behaviour

> of method depend on the Derived(for the Overridden Methods or New
> Methods,of couse the behaviour of the other method of Derived is same

to

> the Base)
>
> hope it helps
>
> "Akhil" wrote:
>

> > Hi All,
> >
> > Can u please explain this.
> >
> > Base Obj = new Derived(); [Base being the base class and Derived being > > the derived the class]
> >
> > Can Obj access methods both of Base and Derived or what will be the
> > behaviour?
> > What will be the behaviour for Overridden Methods?
> >
> > Cheers,
> > Akhil
> >
> >
> >
> >