解决方案,在app.config中添加一个配置节:startup
1 <?xml version="1.0"?> 2 <configuration> 3 <startup useLegacyV2RuntimeActivationPolicy="true"> 4 <supportedRuntime version="v4.0" sku = ".NETFramework,Version=v4.0"/> 5 <supportedRuntime version="v2.0.50727"/> 6 </startup> 7 </configuration>