AddDbContext在一个请求中创建两个实例

我有一个ASP。NET core 2.1应用程序和EF 2 core 我正在使用内置的DI 我这样注册我的课程: 在初创阶段。cs,在配置服务中

    var connectionString = this.configuration.GetConnectionString("MYConnection");
     services.AddDbContext<IMyContext, MyContext>(
            options => options.UseSqlServer(connectionString));

     services.AddScoped<IMy1Dao, My1Dao>();
     services.AddScoped<IMy2Dao, My2Dao>();
     services.AddScoped<IMyService, MyService>();

我像这样注入类:

public class MyController : Controller, IMyController{      
    private readonly IMyService myService;
    public  MyController(IMyService myService)
    {     
                this.myService = myService;      
    }
    public async Task<List<MyBatchUIDTO>> GetMyBatches([FromBody]List<short> ids)
    {
       return await myService.GetMyBatches(ids);
    }
}
public class MyService : IMyService{
    private readonly IMy1Dao my1Dao;
    private readonly IMy2Dao my2Dao;
    public MyService(IMy1Dao my1Dao, IMy2Dao my2Dao)
    {  
        this.my1Dao = my1Dao;
        this.my2Dao = my2Dao;
    }
}
public  partial class MyContext : DbContext, IMyContext
{   
    public MyContext() { }  
    public MyContext(DbContextOptions<MyContext> options)
    {

}
    //left out DBSET<> details
}
public class My1Dao : IMy1Dao
{
    private IMyContext context
    public My1Dao(IMyContext context)
    {
        this.context = context
    }              
}
public class My2Dao :  IMy2Dao
{
    private IMyContext context
    public My2Dao(IMyContext context)
    {
        this.context = context
    }              
}

但是我在MyService构造函数中得到了两个不同的MyContext实例。 而且,当我读到2个DAO时,它们并不共享返回的集。 这就是我需要他们做的。