private void addDesignatioButton_Click(object sender, EventArgs e)
        {
            DesignationUI designationUi = new DesignationUI();
            designationUi.ShowDialog();
            LoadAllDesignation();
            Designation lastAddedDesignation = designationUi.GetLastAddedDesignationThisUI();

            if (lastAddedDesignation != null)
            {
                designationComboBox.Text = lastAddedDesignation.Title;
            }
        }
        private void addDesignatioButton_Click(object sender, EventArgs e)
        {
            DesignationUI designationUi = new DesignationUI();

            designationUi.Show();
        }