编译器错误消息:CS0433: 类型“_Default”同时存在于“c:\Windows\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\root\35b98231\6f7a515\assembly\dl3\445ef5a9\b64a6011_6c17cc01\App_Web_vsjqyqxl.DLL”和“c:\Windows\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.N
参考:http://www.cnblogs.com/Asuphy/p/4206623.html 直接看代码,最简单的引入,只需要3步: using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms