public void ShouldBeValidAgainWhenFirstNameChanged()
        {
            var wrapper = new EmployeeWrapper(_employee);
            wrapper.FirstName = "";

            Assert.IsFalse(wrapper.IsValid);

            wrapper.FirstName = "ab";
            Assert.IsFalse(wrapper.IsValid);

            wrapper.FirstName = "Ahmed";
            Assert.IsTrue(wrapper.IsValid);

            var emailsErrors = wrapper.GetErrors("FirstName").Cast<string>().ToList();
            Assert.AreEqual(0, emailsErrors.Count);

        }