You must install or update .NET to run this application

问题原因

在使用 .net的环境时，出现这个 “You must install or update .NET to run this application” 说明版本不符合

系统默认式是 2.0，3.0版本的，需要更新到5.0版本才行

去官网下载符合自己的版本

官网地址：https://dotnet.microsoft.com/zh-cn/download/dotnet

找到符合自己的.net版本下载

选择符合自己系统的下载文件

下载好一键安装即可，默认会自动配置环境变量，直接使用即可

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