public DrugIssueDetails()
 {
     Id          = 0;
     Quantity    = 0;
     Description = "";
     Issue       = new DrugIssue();
     Batches     = new DrugBatches();
 }
 public DrugTransferDetails()
 {
     Id       = 0;
     Quantity = 0;
     Comments = "";
     Transfer = new DrugTransfer();
     Batches  = new DrugBatches();
 }