private void InitialLoad()
{
var sellerRepository = new SellerRepository();
var clientRespository = new ClientRepository();
cbSeller.DataSource = sellerRepository.GetSellers();
cbSeller.ValueMember = "SellerID";
cbSeller.DisplayMember = "SellerName";
cbDocType.DataSource = clientRespository.GetDocumentTypes();
cbDocType.ValueMember = "DocumentTypeID";
cbDocType.DisplayMember = "Abreviation";
cbDocTypeSearch.DataSource = clientRespository.GetDocumentTypes();
cbDocTypeSearch.ValueMember = "DocumentTypeID";
cbDocTypeSearch.DisplayMember = "Abreviation";
}