public static bool Existed(this IQueryable <AspNetUserLogins> query, AspNetUserLoginsPK key)
 {
     return(query.Any(
                e => e.LoginProvider == key.LoginProvider && e.ProviderKey == key.ProviderKey));
 }
 public static AspNetUserLogins Id(this IEnumerable <AspNetUserLogins> query, AspNetUserLoginsPK key)
 {
     return(query.FirstOrDefault(
                e => e.LoginProvider == key.LoginProvider && e.ProviderKey == key.ProviderKey));
 }