也就是找到的DLL和要匹配的DLL不匹配<?xml version="1.0"?>
<configuration>
<appSettings>
<add key="String1" value="server=127.0.0.1;database=***;uid=sa;pwd=***"/>
<add key="***" value="***"/>
    <add key="****" value="*****"/>
</appSettings>
<connectionStrings/>
<system.web>
<webServices>
<protocols>
<add name="HttpPost"/>
<add name="HttpGet"/>
</protocols>
</webServices>
<compilation debug="true" targetFramework="4.0">
</compilation>
<authentication mode="Windows"/>
<pages controlRenderingCompatibilityVersion="3.5" clientIDMode="AutoID"/></system.web>
</configuration>