反编译出现的异常_ASP.NET

反编译出现的错误

C# code

using System;using System.Data;using Z.Entity;using System.Data.SqlClient;using System.Collections;using System.Collections.Generic;namespace Z.DALFactory{    using System;    using System.Data;    using Z.Entity;    using System.Data.SqlClient;    using System.Collections;    using System.Collections.Generic;    public interface IAward    {        void AddAward(AwardInfo model);        void DeleteAward(int AwardId);        int ExistsAward(int AwardId);        [color=#FF0000]DataTable getAllAwards();[/color]        int GetAwardMaxId();        void UpdateAward(AwardInfo model);    }}

红色的那行有错误

错误为

错误 8 类型“System.ComponentModel.ISupportInitialize”在未被引用的程序集中定义。必须添加对程序集“System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089”的引用。 D:\Disassembler\Z.DALFactory\Z\DALFactory\IAward.cs 21 19 Z.DALFactory

搞不懂

------解决方案--------------------------------------------------------
using System.ComponentModel