Unable to create a constant value of type ' Closure type '. exception

The following exception occurred while using LINQ to Entities:
Unable to create a constant value of type ' Closure type '. Only primitive types (' such as Int32, String, and Guid ') is are supported in the context.


The code is like this:
CTx. Products.where (p => p.status = = (int) s). ToString ();

Where S is an enumerated type of type prodcutstatus:
public enum prodcutstatus{
Open,
Close
}

This is because LINQ to entities generates SQL statements based on the delegates in the where, so there is a limit to the complexity (method) within which the (int) s cannot be translated correctly.
To solve this problem, you need to put this (int) s process outside:

int status = (int) s;
CTx. Products.where (p => p.status = Status). ToString ();

This keeps the relative "clean" inside and does not hinder the dynamic generation of SQL statements.