готовая 2

SoftwareInstallation/SoftwareInstallationFileImplement/OrderStorage.cs

@@ -91,13 +91,8 @@ namespace SoftwareInstallationFileImplement
         }
         private OrderViewModel GetPackageName(OrderViewModel viewModel)
         {
-            foreach (var package in source.Packages)
-            {
-                if (package.Id == viewModel.PackageId)
-                {
-                    viewModel.PackageName = package.PackageName;
-                }
-            }
+            var package = source.Packages.FirstOrDefault(p => p.Id == viewModel.PackageId);
+            viewModel.PackageName = package?.PackageName;
             return viewModel;
         }
     }