去掉IPostBackDataHandler后,RaisePostBackEvent就执行了,为什么?

控件的源码如下:

IPostBackEventHandler和IPostBackDataHandler有冲突?using System;
IPostBackEventHandler和IPostBackDataHandler有冲突?
using System.Web.UI;
IPostBackEventHandler和IPostBackDataHandler有冲突?
using System.Web.UI.WebControls;
IPostBackEventHandler和IPostBackDataHandler有冲突?
using System.ComponentModel;
IPostBackEventHandler和IPostBackDataHandler有冲突?
IPostBackEventHandler和IPostBackDataHandler有冲突?
namespace TestMyRaise

调用的页面Test1.aspx如下:

Test1.aspx.cs:
IPostBackEventHandler和IPostBackDataHandler有冲突?using System;
IPostBackEventHandler和IPostBackDataHandler有冲突?
using System.Collections;
IPostBackEventHandler和IPostBackDataHandler有冲突?
using System.ComponentModel;
IPostBackEventHandler和IPostBackDataHandler有冲突?
using System.Data;
IPostBackEventHandler和IPostBackDataHandler有冲突?
using System.Drawing;
IPostBackEventHandler和IPostBackDataHandler有冲突?
using System.Web;
IPostBackEventHandler和IPostBackDataHandler有冲突?
using System.Web.SessionState;
IPostBackEventHandler和IPostBackDataHandler有冲突?
using System.Web.UI;
IPostBackEventHandler和IPostBackDataHandler有冲突?
using System.Web.UI.WebControls;
IPostBackEventHandler和IPostBackDataHandler有冲突?
using System.Web.UI.HtmlControls;
IPostBackEventHandler和IPostBackDataHandler有冲突?
IPostBackEventHandler和IPostBackDataHandler有冲突?
namespace Test5.RaiseTest

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