Weird debugging problem

[Joe]

I have the following function I use to see if I have an Internet connection.
This function works fine in one application but in another, I get a message
"There is no source code available for the current location" when I try to
step over the WebRequest.Create line. After that message I can't step
through the code yet the code continues to run fine.

If I remove this check then I get the same message when trying to create my
proxy class for my web service.

Any ideas?

public static bool IsConnected(string testUri, string host)
{
bool connected = true;
try
{
UriBuilder uriBuilder = new UriBuilder(testUri);
if (host != null && host.Length > 0)
uriBuilder.Host = host;
System.Net.WebRequest webRequest =
System.Net.WebRequest.Create(uriBuilder.Uri);
System.Net.WebResponse response = webRequest.GetResponse();
response.Close();
}
catch
{
connected = false;
}
return connected;
}