public void IPAddressExtensions_Decrement(string ipAddressStringTest, string ipAddressStringExpected)
{
IPAddress ipAddressTest = IPAddress.Parse(ipAddressStringTest);
IPAddress ipAddressExpected = IPAddress.Parse(ipAddressStringExpected);
var ipAddressDecrement = ipAddressTest.Decrement();
Assert.Equal(ipAddressExpected, ipAddressDecrement);
}