Microsoft.Win32.RegistryKey key = 
	Microsoft.Win32.Registry.CurrentUser.OpenSubKey("Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings");

string proxyEnabled = key.GetValue( "ProxyEnable" ).ToString();

string proxyServer = key.GetValue("ProxyServer") == null ? string.Empty : key.GetValue("ProxyServer").ToString();

System.Net.WebProxy webProxy = System.Net.WebProxy.GetDefaultProxy();

bool bypassProxyForLocal = webProxy.BypassProxyOnLocal;				

Uri address = webProxy.Address;
if ( address != null )
{
	string host = address.Host;
	string port = address.Port.ToString();
}