Several changes before queryDatabase project

CodeFirstExistingDatabase/Migrations/Configuration.cs

@@ -1,3 +1,5 @@
+using System.Collections.ObjectModel;
+
 namespace CodeFirstExistingDatabase.Migrations
 {
     using System;
@@ -14,10 +16,17 @@ namespace CodeFirstExistingDatabase.Migrations
 
         protected override void Seed(CodeFirstExistingDatabase.PlutoContext context)
         {
-            //  This method will be called after migrating to the latest version.
+            context.Authors.AddOrUpdate(a => a.Name,
+                new Author
+                {
+                    Name = "Author 7",
+                    Courses = new Collection<Course>()
+                    {
+                        new Course(){ Name = "Course for Author 7", Description = "Description 7"}
 
-            //  You can use the DbSet<T>.AddOrUpdate() helper extension method 
-            //  to avoid creating duplicate seed data.
+                    }
+                }
+            );
         }
     }
 }