Added possibilities for owners and there addresses

StockDAL/AddressRepository.cs

@@ -19,5 +19,37 @@ namespace StockDAL
                           select adr).FirstOrDefault();
             return entity;
         }
+
+        public Address SaveAddress(Address address)
+        {
+            using var context = new StockContext();
+            var entity = (from adr in context.Addresses
+                       where adr.Id == address.Id
+                       select adr).FirstOrDefault();
+
+            if (entity == null)
+            {
+                entity = new Address
+                {
+                    Street = address.Street,
+                    Street2 = address.Street2,
+                    Zipcode = address.Zipcode,
+                    Destination = address.Destination,
+                    Nation = address.Nation
+                };
+                context.Addresses.Add(entity);
+            }
+            else
+            {
+                entity.Street = address.Street;
+                entity.Street2 = address.Street2;
+                entity.Zipcode = address.Zipcode;
+                entity.Destination = address.Destination;
+                entity.Nation = address.Nation;
+            }
+
+            context.SaveChanges();
+            return entity;
+        }
     }
 }