Cast linq results to List

Question

I have extended my entities to implement specific interfaces for its type. I am trying to perform the following query:

 var results = from x in context.MyEnt         


        

Answer 1

If you want to cast your results to a complex type, you need to force the code to use LINQ to Objects rather than LINQ to Entities.

Calling the AsEnumerable extension method before the cast is the trick here.

Try the following:

var results = from x in context.MyEntityTable
              where x.AProperty == AValue
              select x;

return results.AsEnumerable().Cast().ToList();

Also note that it's not wise to check Count() on the enumerable, since it means the collection is iterated over twice.