public string Save(Candidate aCandidate)
 {
     if (HasThisName(aCandidate.Name) || HasThisSymbol(aCandidate.Symbol))
     {
         return "This Name or Symbol is already incluted. Check Once";
     }
         return aCandidateGateway.Save(aCandidate);
 }
        private void saveButton_Click(object sender, EventArgs e)
        {
            Candidate aCandidate=new Candidate(candidateNameTextBox.Text,symbolTextBox.Text);

            string msg = aCandidateEntryBLL.Save(aCandidate);
            MessageBox.Show(msg);

            candidateNameTextBox.Text = String.Empty;
            symbolTextBox.Text = String.Empty;
        }