Multiple foreign key

public class Chat
    {
        [Key]
        public int MessageId { get; set; }
        [Required]
        public int FromUserId { get; set; }
        [Required]
        public int ToUserId { get; set; }
        [Required]
        public string Message { get; set; }
        [Required]
        public DateTime Time { get; set; }
        
        public virtual ICollection<UserProfile> UserProfiles { get; set; }
    }

var name = db.UserProfiles.Find(2);

public void getMessages()
       {
           var db = new UsersContext();
           var messages = from a in db.Messages where a.FromUserId== WebSecurity.CurrentUserId || a.ToUserId==WebSecurity.CurrentUserId select a;

           foreach(var a in messages)
           {
               if (a.FromUserId == WebSecurity.CurrentUserId)
               {
                   Clients.Caller.addNewMessageToPage(WebSecurity.CurrentUserName, a.Message);
               }
               else
               {
                   var name = db.UserProfiles.Find(2);
                   Clients.Caller.addNewMessageToPage(name.UserName, a.Message);
               }
           }
           db.Dispose();

       }