1.检查模型是否存在重复的字段,eg:
public class AggregateRoot
{
public System.Guid Guid { get; set; }
}
 public partial class User : AggregateRoot
    {
        public int ID { get; set; }
//在父类已经定义了Guid,子类又重新定义,故报此错误,元素重复
public System.Guid Guid { get; set; }
        public int DepId { get; set; }
        public string Name { get; set; }
        public string Pwd { get; set; }
        public bool Gender { get; set; }
        public string Post { get; set; }
        public string Address { get; set; }
        public bool IsDel { get; set; }
        public System.DateTime AddTime { get; set; }
        public System.DateTime UpdateTime { get; set; }
    }
原文:http://www.cnblogs.com/pari-Zhong/p/4420783.html