Entity framework and MVC3 include method

LINQ "include" missing. after reading this post: http://romiller.com/2010/07/14/ef-ctp4-tips-tricks-include-with-lambda/

i would like to use include. this is my class:

public class Service
{

#region Properties

/// <summary>
/// Gets or sets CatalogRootNodeId.
/// </summary>
public virt开发者_如何学JAVAual int CatalogRootNodeId { get; set; }


/// <summary>
/// Gets or sets ServiceDomain.
/// </summary>
public virtual ICollection<ServiceDomain> ServiceDomain { get; set; }

#endregion
}

I would like to "Include" all ServiceDomains but "Include" option is not there ?? I'm working with MVC3 and EF. thanks

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Are you using CTP5 or CTP4? If you do, you can use the extension method from System.Data.Entity.DbExtensions.Include.

public static IQueryable<T> Include<T>(this IQueryable<T> source, Expression<Func<T, object>> path)


var db = new MyDbContext();
var services = db.Services.Where(s => s.CatalogRootNodeId == 1).Include(s => s.ServiceDomain);

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You need to call Include() on the ObjectSet<Service> from the DataContext.