MongoDB查询转对象是出错Element '_id' does not match any field or property of class

MongoDB查询转对象是出错Element '_id' does not match any field or property of class

解决方法：

1、在实体类加：[BsonIgnoreExtraElements]

2、或者定义public ObjectId _id { get; set; }

例子：

[BsonIgnoreExtraElements]

public class BaseData 
    { 
        //public ObjectId _id { get; set; }

        public string cNo { get; set; }

        public string customer { get; set; }

        public long batchNo { get; set; }

        public DateTime mDate { get; set; }

        public string mUser { get; set; } 
    }

http://www.cnblogs.com/94cool/p/6230202.html