crea venta pero no imprime

database/modelos/Merma.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace compabetov2.database.modelos
+{
+    public class Merma
+    {
+        public long idMerma;
+        public string fecha;
+        public string responsable;
+        public string razon;
+
+        public Merma(long idMerma, string fecha, string responsable, string razon)
+        {
+            this.idMerma = idMerma;
+            this.fecha = fecha;
+            this.responsable = responsable;
+            this.razon = razon;
+        }
+    }
+}