Added some initiating data for working further in this projekt

CodeFirstExistingDatabase/Migrations/201911122203311_AddCategoryColumnToCoursesTable.cs

@@ -0,0 +1,23 @@
+namespace CodeFirstExistingDatabase.Migrations
+{
+    using System;
+    using System.Data.Entity.Migrations;
+    
+    public partial class AddCategoryColumnToCoursesTable : DbMigration
+    {
+        public override void Up()
+        {
+            AddColumn("dbo.Courses", "Category_Id", c => c.Int());
+            CreateIndex("dbo.Courses", "Category_Id");
+            AddForeignKey("dbo.Courses", "Category_Id", "dbo.Categories", "Id");
+            Sql("UPDATE Courses SET Category_Id = 1");
+        }
+        
+        public override void Down()
+        {
+            DropForeignKey("dbo.Courses", "Category_Id", "dbo.Categories");
+            DropIndex("dbo.Courses", new[] { "Category_Id" });
+            DropColumn("dbo.Courses", "Category_Id");
+        }
+    }
+}