ASP.NET MVC3 System.ComponentModel.DataAnnotations and Association

Question

This part of code works fine

[Association(Storage = "profile", ThisKey = "UserId", OtherKey = "UserId")]
public Profile User {
   get { return this.profile.Entity; }
   set { this.profile.Entity = value; }
}

but if i add in this class

System.ComponentModel.DataAnnotations 

then, Association could not be found.

Where is the problem ?

Answer 1

It looks like you've got two namespaces that are conflicting. Try changing Association to System.Data.Linq.Mapping.Association, so it would look like:

[System.Data.Linq.Mapping.Association(Storage = "profile", ThisKey = "UserId", OtherKey = "UserId")]
public Profile User {
   get { return this.profile.Entity; }
   set { this.profile.Entity = value; }
}

Answer 2

An enhancement to Austin's answer is to employ the using statement:

using L2SAssociation = System.Data.Linq.Mapping.Association;

[L2SAssociation(Storage = "profile", ThisKey = "UserId", OtherKey = "UserId")]
public Profile User
{
   get { return this.profile.Entity; }
   set { this.profile.Entity = value; }
}