如何在ASP.NET MVC5中的post操作中更新实体内的集合？

I have created an ASP.NET MVC5 sample project. I created my entities and from that, scaffolded the controllers for CRUD operations. I can only edit the POD members with the scaffolded code. I want to be able to add/remove related entities.I have created an ASP.NET MVC5 sample project.