C#

I started to learn how to write mvc tests  from the following site http://www.asp.net/mvc/tutorials/older-versions/contact-manager/iteration-5-create-unit-tests-cs"

However when running the test I keep getting a object not set to instance exception  

 [TestMethod]
        public void CreateRace()
        {




            //Arrange

            RACE race = new RACE();

            race.RACE_CODE = 1;
            race.Logourl = "dasdad";
            race.RegattaCity = "Durban";
            race.RegattaProvince = "Kzn";
            race.RegattaStreetAddress = "232Chats";
            race.MAXPARTICA = 12;
            race.SECRETARY_EMAIL = "ssasda";
            race.SECRETARY_MOBILE = 1422434;
            race.SECRETARY_NAME = "jsjsjs";

            race.ENTRYAMOUNT = Convert.ToDecimal(23.58);

            race.EVENT_NAME = "sadada";
            race.status = "Active";
            race.UserId = 1;

            race.LATEENTRYAMOUNT = Convert.ToDecimal(23.58);

            string eventstart = "2014/05/12 12:02", eventend = "2014/05/17 12:02", entrydeadline = "2014/05/11 12:02", withdrawdate = "2014/05/11 12:02", YachtClubname = "durban";

            //Act
            var result = _service.CreateRace(race, eventstart, eventend, entrydeadline, withdrawdate, YachtClubname, "Kzn");




            //Assert

            Assert.IsTrue(result);
}

public bool CreateRace(RACE race, string eventstart, string eventend, string entrydeadline, string withdrawaldate,string YachtClubname,string Province )
      {

          if (!ValidateRace( race,eventstart,  eventend,  entrydeadline, withdrawaldate,YachtClubname,Province))
              return false;

          // Database logic
          try
          {
              _repository.CreateRace(race, eventstart, eventend,  entrydeadline, withdrawaldate,YachtClubname,Province);

          }
          catch
          {
              return false;
          }
          return true;
      }

private void SendMail_Click(object sender, EventArgs e)
        {
            if (textBox1.Text == "" || textBox2.Text == "" || textBox3.Text == "")
            {
                MessageBox.Show("Require, must content the row !!!");
            }
            else
                try
                {
                    obj_SMTPClient = new SmtpClient("smtp.gmail.com");
                    Obj_MailMsg = new MailMessage();
                    obj_Attachment = new System.Net.Mail.Attachment(textBox7.Text);
                    Obj_MailMsg.From = new MailAddress(textBox1.Text);
                    Obj_MailMsg.To.Add(textBox3.Text);
                    Obj_MailMsg.Body = textBox5.Text;
                    Obj_MailMsg.Attachments.Add(obj_Attachment);
                    Obj_MailMsg.Subject = textBox4.Text;
                    SmtpClient smtps = new SmtpClient("smtp.gmail.com", 587);
                    obj_SMTPClient.Credentials = new NetworkCredential();
                    obj_SMTPClient.Port = 587;
                    obj_SMTPClient.Credentials = new System.Net.NetworkCredential(textBox1.Text, textBox2.Text);
                    obj_SMTPClient.EnableSsl = true;
                    obj_SMTPClient.Send(Obj_MailMsg);
                    
                    obj_SMTPClient.EnableSsl = true;
                    obj_SMTPClient.Send(Obj_MailMsg);
                    MessageBox.Show("Message Successfuly Sent!!!");
                }
                catch
                {
                    MessageBox.Show("Failed to Send Message!!!");
                }
        }
		
		 private void EncryptionText_Click_1(object sender, EventArgs e)
        {
            cipherData = textBox6.Text;
            plainbytes = Encoding.ASCII.GetBytes(cipherData);
            // generating symmetric key
            desObj.GenerateKey();
            // generating vector
            desObj.GenerateIV();
            // choose other appropriate modes (CBC, CFB, CTS, ECB, OFB)
            desObj.Mode = CipherMode.CBC;
            // setting the padding mode
            desObj.Padding = PaddingMode.PKCS7;
            // --------------- ECRYPTION ---------------
            // memory stream used as a target to write enrypted data
            MemoryStream ms = new MemoryStream();
            // transforms and encrypts plaintext data to memorystream object
            CryptoStream cs = new CryptoStream(ms,
                desObj.CreateEncryptor(),
                CryptoStreamMode.Write);
            cs.Write(plainbytes, 0, plainbytes.Length);
            cs.Close();
            // getting encrypted data from memorystream to bytes
            cipherbytes = ms.ToArray();
            ms.Close();
            textBox5.Text = Encoding.ASCII.GetString(cipherbytes);
        }

        private void DecryptionText_Click_1(object sender, EventArgs e)
        {
            // --------------- DECRYPTION ---------------
            MemoryStream ms1 = new MemoryStream(cipherbytes);
            CryptoStream cs1 = new CryptoStream(ms1,
                desObj.CreateDecryptor(),
                CryptoStreamMode.Read);
            // allocate array of bytes equal on lenght with ciphertext array
            plainbytes = new Byte[cipherbytes.Length];
            // decrypt the ciphertext from previous section
            cs1.Read(plainbytes, 0, cipherbytes.Length);
            cs1.Close();
            ms1.Close();
            textBox5.Text = Encoding.ASCII.GetString(plainbytes);
        }