public static void ReverseByteOrderExtension_UInt64_Test() { UInt64 origin = 0x0123456789ABCDEF; UInt64 test = origin.ReverseByteOrder(false); Assert.AreEqual(test, origin); test = origin.ReverseByteOrder(true); Assert.AreEqual(test, 0xEFCDAB8967452301); }