private void FillClientListDropDown()
{
DbTransaction dbTransaction = new DbTransaction();
List <ClientListTable> allClientList = dbTransaction.GetAllClientList();
if (allClientList.Count > 0)
{
this.clientNameComboBox.Items.Clear();
this.clientNameComboBox.Items.AddRange(allClientList.Where(x => x.ClientName != "").Select(x => x.ClientName).Distinct().ToArray());
}
}