出现错误
The type 'System.Web.UI.ScriptManager' exists in both 'c:/WINDOW/assembly/GAC_MSIL/System.Web.Extensions/3.5.0.0__31bf3856ad364e35/System.Web.Extensions.dll' and 'c:/WINDOW/assembly/GAC_MSIL/System.Web.Extensions/1.0.61025.0__31bf3856ad364e35/System.Web.Extensions.dll'
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只要aspx的html代码页面上边加
<%@ Register Assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"
Namespace="System.Web.UI" TagPrefix="asp" %>
把原来的覆盖,或者把version后面的版本改了就ok