public bool isExitReferenceInvoice(string refenceInvoice)
{
using (var db = new KoontabiDBEntities())
{
var _referenceInvoice = db.SpValidateIfExitRefenceInvoice(refenceInvoice).FirstOrDefault();
return(_referenceInvoice != null? _referenceInvoice.ReferenceInvoice == 1:false);
}
}