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博客园 - 深圳大漠

Windows Server 2022 安装 SqlServer2000 Windows 11 登录后黑屏,只有一个可以移动的鼠标 SqlServer查数据表的记录数 Swagger UI 报错 Flutter升级错误 Error: failed to push some refs to ORA-28040: 没有匹配的验证协议 CS8600错误 如何让MAUI项目打包成apk而不是abb The current Gradle version 5.6.2 is not compatible with the Kotlin Gradle plugin. Please use Gradle 6.1.1 or newer, or the previous version of the Kotlin plugin Flutter常见错误记录 VSCode设置Flutter(Dart)自动折行宽度 analysis_options.yaml Fiddler抓HttpClient的包 VSCode开发WebApi EFCore的坑 百度语音合成调用DEMO Connection closed before full header was received SqlServer报错:指定的网络名不再可用 Flutter Build apk 错误(一)
修改项目语言为C#8.0
深圳大漠 · 2019-12-04 · via 博客园 - 深圳大漠

错误 CS8370 功能“Using 声明”在 C# 7.3 中不可用。请使用 8.0 或更高的语言版本。 

用记事本打开项目文件 XXX.csproj,找到LangVersion,修改为8.0。

如果没有LangVersion项,就在<WarningLevel>4</WarningLevel>(有两处)下面手工增加 <LangVersion>8.0</LangVersion>。