限制数据，所以我没有得到循环引用异常

Question

我试图弄清楚如何限制从linq查询中的相关子表中调用的字段。在此示例中为events表。事件表与联系人之间存在关系，因此当我尝试将其序列化以返回为json时，它会出现循环引用异常。如何在不将参考文献拉回联系的情况下仅从事件​​中提取信息？

var data = (from c in Contacts
            .Where(a => a.LastName.Contains("Smith"))
            let pa = c.Addresses.Where(a=>a.AddressType.Name.Contains("Primary")).FirstOrDefault ()
            let e= c.Events.Take(5).OrderByDescending (x =>x.DateTime )             
            select  new
            {
                c.Id,
                value = c.LastName + ", " + c.FirstName ,
                Street1 = pa.Street1,
                Street2 = pa.Street2,
                City = pa.City,
                State = pa.State,
                PostalCode = pa.PostalCode,                   
                , Events= e
            })
            .Take(10).ToArray()