AsNoTracking() and Include

问题

I have a Linq query that fetches an entity and some of its navigation properties.

context.MyEntity
    .AsNoTracking()
    .Include(i=> i.Nav1)
    .Include(i=> i.Nav2)
    .Where(x=> x.Prop1==1)
    .FirstOrDefault();

my question is:

Is the above query enough to not track MyEntity nor the navigation properties NAv1& Nav2 or must I add AsNoTracking for each navigation property?

like this:  

context.MyEntity
    .AsNoTracking()
    .Include(i=> i.Nav1)
    .AsNoTracking()
    .Include(i=> i.Nav2)
    .AsNoTracking()
    .Where(x=> x.Prop1==1)
    .FirstOrDefault();

回答1:

Use AsNoTracking after you have completed all your query parameters but before you move the data into memory. In this example, you'll want:

context.MyEntity
    .Include(i=> i.Nav1)
    .Include(i=> i.Nav2)
    .Where(x=> x.Prop1==1)
    .AsNoTracking()
    .FirstOrDefault();

Any child objects of the parent entity will not be tracked.

来源：https://stackoverflow.com/questions/42002540/asnotracking-and-include