Question

using System.ComponentModel.DataAnnotations;    

public class UserArmy
    {
        [Key, Column(Order = 1)]
        public Guid UserId { get; set; }
        [Key, Column(Order = 2)]
        public int UnitId { get; set; }
        public int Quantity { get; set; }
    }

Here is a model class I have. I’m using the Entity Framework, Code First approach. The [Key] attribute is recognised but not the Column(Order=x).

Am I missing something that needs to be included?

Thanks 🙂

Answer 1

You must add following namespace:

using System.ComponentModel.DataAnnotations.Schema;

http://msdn.microsoft.com/en-us/library/system.componentmodel.dataannotations.schema.aspx