public void RepositoryTest_ContainsKeyFalse()
        {
            //Arrange
            var contactsDto = new List <ContactDto>()
            {
                new WorkDto()
                {
                    TaxId        = 1,
                    Name         = "Name",
                    Address      = "address1",
                    Company      = "Company",
                    EmailAddress = "*****@*****.**",
                    PhoneNumber  = "000000000",
                    Title        = "Title",
                    Url          = "www.url.com"
                },
            };
            var repository = new ContactRepository(contactsDto);

            //Act
            var result = repository.ContainsKey(2);

            //Assert
            Assert.AreEqual(result, false);
        }