public static ValidatorResult DeleteById <TEntity, TKey>(this IEntityManager <TEntity, TKey> manager, TKey id)
where TKey : IEquatable <TKey>
where TEntity : class, IEntity <TKey>
{
if (manager == null)
{
throw new ArgumentNullException("manager");
}
return(AsyncHelper.RunSync(() => manager.DeleteByIdAsync(id)));
}