private void Button_Click(object sender, RoutedEventArgs e)
{
EmployeeForm form = new EmployeeForm();
this.Hide();
form.Show();
}
private void Button_Click_1(object sender, RoutedEventArgs e)
{
EmployeeViewModel employee = (EmployeeViewModel)EmployeeDG.SelectedItems[0];
EmployeeForm EditForm = new EmployeeForm(employee);
EditForm.Show();
this.Hide();
}