Cannot convert lambda expression to type 'string' because it is not a delegate type

Question

In my controller i am trying to use include with EF4 to select related entities, but the lambda expression is throwing the following error,

i have the related entity de

Answer 1

Include is an extension method in the System.Data.Entity namespace, you need to add:

using System.Data.Entity;

Then you can use the lambda expression, instead of the string.