private void btnSave_Click(object sender, EventArgs e)
 {
     if (Ename.Text == "")
     {
         MessageBox.Show("Name cannot be null");
     }
     if (DateTime.Parse(Edoj.Text) > DateTime.Now)
     {
         MessageBox.Show("Date of joining  should be always less than today's date");
     }
     if (double.Parse(Esal.Text) < 100000 && double.Parse(Esal.Text) > 50000000)
     {
         MessageBox.Show("Salary should be between 100000 and 50000000");
     }
     if (!enumber.Contains((Enum.Text)))
     {
         enumber.Add(Enum.Text);
     }
     else
     {
         MessageBox.Show("Ecnumber should be unique.");
     }
     if (!edepartment.Contains(Edep.Text.ToLower()))
     {
         MessageBox.Show("Department not in the list.");
     }
     Enum.Clear();
     Ename.Clear();
     Edoj.Text      = "mm-dd-yyyy";
     Edoj.ForeColor = Color.Silver;
     Esal.Clear();
     Edep.Clear();
 }
 private void Edoj_KeyUp(object sender, KeyEventArgs e)
 {
     if (e.KeyCode == Keys.Enter)
     {
         Edep.Focus();
     }
 }