DeviceNetworkInformation.IsNetworkAvailable
// Summary:
// Gets a value that indicates whether the network is available.
//
// Returns:
// true if there is at least one network interface available; otherwise, false.
public static bool IsNetworkAvailable { get; }
NetworkInterface.GetIsNetworkAvailable ()
// Summary:
// Indicates whether any network connection is available.
//
// Returns:
// true if a network connection is available; otherwise, false.
[SecuritySafeCritical]
public static bool GetIsNetworkAvailable();
Они идентичны?