private void userButton_Click(object sender, EventArgs e)
        {
            if (userNameTextBox.Text == "")
            {
                MessageBox.Show("Please enter user name", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                userNameTextBox.Focus();
                return;
            }
            if (passwordTextBox.Text == "")
            {
                MessageBox.Show("Please Type Password", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                passwordTextBox.Focus();
                return;
            }
            if (nameTextBox.Text == "")
            {
                MessageBox.Show("Please Type your Full Name", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                nameTextBox.Focus();
                return;
            }
            if (designationTextBox.Text == "")
            {
                MessageBox.Show("Please Type your designation", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                designationTextBox.Focus();
                return;
            }
            if (departmentTextBox.Text == "")
            {
                MessageBox.Show("Please Type your Department", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                departmentTextBox.Focus();
                return;
            }
            int         us       = 0;
            UserManager aManager = new UserManager();

            try
            {
                con = new SqlConnection(cs.DBConn);
                con.Open();
                string ct = "Select Username from Registration where Username='******'";
                cmd            = new SqlCommand(ct);
                cmd.Connection = con;
                rdr            = cmd.ExecuteReader();
                if (rdr.Read())
                {
                    MessageBox.Show("This User Already Exists", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    Reset();
                    userNameTextBox.Focus();

                    if ((rdr != null))
                    {
                        rdr.Close();
                    }
                    return;
                }

                User nUser = new User
                {
                    UserName    = userNameTextBox.Text,
                    Password    = passwordTextBox.Text,
                    UserType    = txtUserComboBox.Text,
                    Name        = nameTextBox.Text,
                    Email       = emailTextBox.Text,
                    Designation = designationTextBox.Text,
                    Department  = departmentTextBox.Text,
                    ContactNo   = contactNoTextBox.Text
                };
                us = aManager.SaveUser(nUser);
                MessageBox.Show("Successfully  User Created.", "Record", MessageBoxButtons.OK, MessageBoxIcon.Information);

                userButton.Enabled = false;
                Reset();

                frmLogin lg = new frmLogin();
                this.Visible = false;
                lg.ShowDialog();
                this.Visible = true;
            }
            catch (FormatException formatException)
            {
                MessageBox.Show("Please Enter Input in Correct Format", formatException.Message);
            }
            catch (Exception exception)
            {
                MessageBox.Show(exception.Message);
            }
        }