.net 4 环境调用 .net 2 编译的DLL

配置文件加这个：

<startup useLegacyV2RuntimeActivationPolicy="true">

  <supportedRuntime version="v4.0" />

  </startup>

  <runtime>

  <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">

  <dependentAssembly>

  <assemblyIdentity name="XXX" publicKeyToken="YYYYYYYYY" culture="neutral"/>

  <codeBase version="v2.0.50727" href="XXX.dll"/>

  </dependentAssembly>

  </assemblyBinding>

  </runtime>