public void OnUpdateChangesClick(object sender, RoutedEventArgs e)
        {
            List <log> entries = new List <log>();

            if (!currentEmployee.name.Equals(nameTextBox.Text))
            {
                entries.Add(logEntry("Name", currentEmployee.name, nameTextBox.Text));
                currentEmployee.name = nameTextBox.Text;
            }
            if (!currentEmployee.address.Equals(addressTextBox.Text))
            {
                entries.Add(logEntry("Address", currentEmployee.address, addressTextBox.Text));
                currentEmployee.address = addressTextBox.Text;
            }
            if (!currentEmployee.email.Equals(emailTextBox.Text))
            {
                entries.Add(logEntry("Email", currentEmployee.email, emailTextBox.Text));
                currentEmployee.email = emailTextBox.Text;
            }
            if (!currentEmployee.phone.Equals(phoneTextBox.Text))
            {
                entries.Add(logEntry("Phone", currentEmployee.phone, phoneTextBox.Text));
                currentEmployee.phone = phoneTextBox.Text;
            }
            if (!currentEmployee.employment_status.Equals(employmentStatusComboBox.Text))
            {
                entries.Add(logEntry("Employment Status", currentEmployee.employment_status, employmentStatusComboBox.Text));
                currentEmployee.employment_status = employmentStatusComboBox.Text;
            }
            if (!currentEmployee.shift.Equals(shiftComboBox.Text))
            {
                entries.Add(logEntry("Shift", currentEmployee.shift, shiftComboBox.Text));
                currentEmployee.shift = shiftComboBox.Text;
            }
            if (!currentEmployee.favorite_color.Equals(favoriteColorTextBox.Text))
            {
                entries.Add(logEntry("Favorite Color", currentEmployee.email, favoriteColorTextBox.Text));
                currentEmployee.favorite_color = favoriteColorTextBox.Text;
            }
            if (startDatePicker.SelectedDate.HasValue)
            {
                if (!currentEmployee.start_date.Equals(startDatePicker.SelectedDate.Value))
                {
                    entries.Add(logEntry("Start Date", currentEmployee.start_date, startDatePicker.SelectedDate.Value));
                }
                currentEmployee.start_date = startDatePicker.SelectedDate.Value;
            }
            if (endDatePicker.SelectedDate.HasValue)
            {
                if (!currentEmployee.start_date.Equals(endDatePicker.SelectedDate.Value))
                {
                    entries.Add(logEntry("End Date", currentEmployee.end_date, endDatePicker.SelectedDate.Value));
                }
                currentEmployee.end_date = endDatePicker.SelectedDate.Value;
            }
            if (!currentEmployee.position.name.Equals(positionComboBox.Text))
            {
                entries.Add(logEntry("Position", currentEmployee.position.name, positionComboBox.Text));
                currentEmployee.position_id = (from posi in dbContext.positions
                                               where posi.name == positionComboBox.Text
                                               select posi.id).First();
            }
            if (!currentEmployee.department.name.Equals(departmentComboBox.Text))
            {
                entries.Add(logEntry("Department", currentEmployee.department.name, departmentComboBox.Text));
                currentEmployee.department_id = (from dept in dbContext.departments
                                                 where dept.name == departmentComboBox.Text
                                                 select dept.id).First();
            }

            string mgrString = managerComboBox.Text;

            string[] parts = mgrString.Split('-');
            if (parts.Length > 1)
            {
                int newManagerId = Int32.Parse(parts[1].Trim());
                if (currentEmployee.manager_id != newManagerId)
                {
                    entries.Add(logEntry("Manager", oldManagerName, parts[0].Trim()));
                    currentEmployee.manager_id = newManagerId;
                }
            }

            int len = dbContext.employees.Local.Count();
            int pos = len;

            for (int i = 0; i < len; i++)
            {
                if (currentEmployee.id == dbContext.employees.Local[i].id)
                {
                    pos = i;
                    break;
                }
            }

            dbContext.employees.Local.Insert(pos, currentEmployee);
            dbContext.SaveChanges();

            addChangeLog(entries);

            EmployeeDetails employeeDetails = new EmployeeDetails(currentEmployee.id);

            this.NavigationService.Navigate(employeeDetails);
        }
        private void OnCancelClick(object sender, RoutedEventArgs e)
        {
            EmployeeDetails employeeDetails = new EmployeeDetails(currentEmployee.id);

            this.NavigationService.Navigate(employeeDetails);
        }