C#提示 未能加载文件或程序集log4net

 

发生原因：程序引用了2个log4net程序集，有部分功能必须指定版本所以导致此问题。试了重定向到高版本也不行，最后找到的解决办法 在web.config runtime>assemblyBinding下添加下面节点解决。添加2个log4net.dll的路径和版本信息，程序会自动去关联对应版本的log4net.dll

<dependentAssembly>
        <assemblyIdentity name="log4net"
          publicKeyToken="669e0ddf0bb1aa2a" Culture="neutral"/>
        <bindingRedirect oldVersion="1.2.13.0" newVersion="2.0.8.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="log4net"
          publicKeyToken="669e0ddf0bb1aa2a"
          culture="neutral" />
        <publisherPolicy apply="no" />
      </dependentAssembly>
      <dependentAssembly>  
    <assemblyIdentity name="log4net" publicKeyToken="669e0ddf0bb1aa2a" />  
      <codeBase version="1.2.13.0" href="DLL\log4net.dll" />  
      <codeBase version="2.0.8.0" href="DLL\2\log4net.dll" />  
    </dependentAssembly>