Unable to create a constant value of type 'System.Object' in Entity Framework

Question

I have a table named UserTenders having many-to-one relationship with aspnet_Membership table.
I am using EntityFramework 4.0 and when I try so

Answer 1

Just wanted to point out, you could have also used tender.HasAdminApproved.HasValue.Equals(true))... this works when bool allows nulls