private void BtnAdd_Click(object sender, EventArgs e)
 {
     credentials                  = credentials ?? new Credentials();
     credentials.Name             = tbName.Text;
     credentials.Group            = cbGroup.SelectedIndex == 0 ? String.Empty : cbGroup.Text;
     credentials.AlternativeLink  = tbAlternativeLink.Text;
     credentials.Link             = tbLink.Text;
     credentials.Username         = tbUsername.Text;
     credentials.Password         = tbPassword.Text;
     credentials.ExtraInformation = rtbExtraInformation.Text;
     credentials.ActorType        = ActorType.User;
     credentials.ActorId          = Initializer.LoggedInUser.Id;
     credentialsRepository.AddOrUpdate(credentials);
     credentials = null;
 }