capture the text , Socket Class

Question

Hi all I have two question and i hope if anyone can help me: 1 - when i want to capture the text on the internet explorer address bar with C# i used this code : string url=Request.Url; what is the namespace of Request object. 2 - until i can reach to port uesd C# i use the Socket Class really i cann't to used it can anyone explain how i can to use until i can reach to port and I'm wondering if anyone can help. thanks