protected void saveButton_Click(object sender, EventArgs e)
        {
            if (Page.IsValid)
            {
                string   name               = employeeNameTextBox.Text;
                string   email              = emailAddressTextBox.Text;
                string   mobileNumber       = mobileNumberTextBox.Text;
                string   district           = districtTextBox.Text;
                string   gender             = genderDropDownList.SelectedItem.Text;
                DateTime dateOfBirth        = DateTime.Parse(dateSelectTextBox.Text);
                int      registrationNumber = Convert.ToInt32(registrationNumberTextBox.Text);
                Employee newEmployee        = new Employee(name, email, mobileNumber, district, gender, dateOfBirth, registrationNumber);
                int      departmentID       = Int32.Parse(ddlDepartment.SelectedValue);
                newEmployee.DepartmentID = departmentID;
                newDepartMent.Employees.Add(newEmployee);

                if (employeeManagement.IsExist(newEmployee))
                {
                    msgLabel.Text      = "Employee Id Already Exist";
                    msgLabel.ForeColor = Color.Red;
                    registrationNumberTextBox.Focus();
                }
                else
                {
                    msgLabel.Text = employeeManagement.SendData(newEmployee);
                    GetClear();
                }
            }
        }