bit of generic c# code

must be written useing .net 2.0 code which checks for internet connectivity for example it goes to [login to view URL] and checks for certain keyword if it finds that means there is internet and it goes on with execution if it does not find it makes a message box which asks user to connect internet and it has close or retry buttons if the user clicks retry the code loops and trys again if they click close the app closes if it finds internet it continues execution, on each run it does this check i am a programmer so i expect to be treated like one thanks