C# App: Socket programming

[maryammasood]

Hi
i am using C#.net (Visual Studio2005)
when ever i use this code, my program runs well

Socket listenSocket = new Socket(AddressFamily.InterNetwork,
                                     SocketType.Stream,
                                     ProtocolType.IP );

but if i use

Socket listenSocket = new Socket(AddressFamily.InterNetwork,
                                     SocketType.Stream,
                                     ProtocolType.IPv4 );

it gives error: "The requested protocol has not been configured into the system, or no implementation for it exists"
what should i do for it
thanks

[Plater]

First off, please don't double post your question in the future.

Well generally you would be using

ProtocolType.Tcp
 

So why you are trying to use either of those I don't know. Unless you're trying to send routing packets?