Question

I’m in the early stages of learning to use Entity Framework 4.1 using the book “Programming Entity Framework” using C# in VS2010. I’ve run into a problem that’s probably obvious to an experienced EF programmer.

“System.Linq.IQueryable’ does not contain a definition for ‘Title’ and no extension method ‘Title’ accepting a first argument of type ‘System.Linq.IQueryable’ could be found (are you missing a using directive or an assembly reference?)

The ‘contacts’ fields are identified correctly in the pop-up help, but trying to access those fields generates the error shown above. While typing in ‘contacts’, the pop-up fields list does not contain any of the underlined fields.

I don’t understand this inconsistency and would welcome your help.

Answer 1

var contacts = (from c in context.Person_Contacts
               where c.FirstName == "Robert"
               select new { c.Title, c.FirstName, c.LastName }).FirstOrDefault();

Console.WriteLine("{0} | {1} | {2}", contacts.Title, contacts.FirstName, contacts.LastName);

Console.ReadLine();

Try that