错误出现在visualstudio2017和xamarin上:SeverityCodeDescriptionProjectFileLineSuppressionStateWarningThe$(TargetFrameworkVersion)forFormsViewGroup.dll(v7.1)isgreaterthanthe$(TargetFrameworkVersion)foryourproject(v6.0).Youneedtoincreasethe$(TargetFrameworkVersion)foryourproject.IpiCommunicationXamarin.And