private void DetachSalesTrend(SalesTrend entity)
 {
     entity.Company = null;
 }
 private bool FilterSalesTrend(SalesTrend entity)
 {
     return (entity.CompanyID == this.CompanyID);
 }
 private void AttachSalesTrend(SalesTrend entity)
 {
     entity.Company = this;
 }