今天git clone一项目，用VS2022打开后发现是.net7的，马上去微软官网下载安装.Net7 SDK，安装完.Net7 SDK后，再次运行之前的.Net6的项目执行dotnet watch run命令时报错，具体报错信息如下：
Unhandled exception. System.IO.FileNotFoundException: Could not load file or assembly 'System.Runtime, Version=7.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. 系统找不到指定的文件。
File name: 'System.Runtime, Version=7.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'
at System.Reflection.RuntimeAssembly.GetType(QCallAssembly assembly, String name, Boolean throwOnError, Boolean ignoreCase, ObjectHandleOnStack type, ObjectHandleOnStack keepAlive, ObjectHandleOnStack assemblyLoadContext)
at System.Reflection.RuntimeAssembly.GetType(String name, Boolean throwOnError, Boolean ignoreCase)
at System.Reflection.Assembly.GetType(String name, Boolean throwOnError)
at System.StartupHookProvider.CallStartupHook(StartupHookNameOrPath startupHook)
at System.StartupHookProvider.ProcessStartupHooks()
dotnet watch ❌ Exited with error code -532462766
dotnet watch ⏳ Waiting for a file to change before restarting dotnet...
临时解决方案: 在.Net6工程运行目录下建立 global.json 文件指定编译框架
{
"sdk": {
"version": "6.0.403"
}
}
上文件中的version的6.0.403根据自己电脑中已安装的.Net 6.0 SDK版本自行修改。
如果你的电脑没有6.0.403版本，将会出现如下提示：
The command could not be loaded, possibly because:
* You intended to execute a .NET application:
The application 'watch' does not exist.
* You intended to execute a .NET SDK command:
A compatible .NET SDK was not found.
Requested SDK version: 6.0.203
global.json file: d:\71620.org\global.json
Installed SDKs:
3.1.425 [C:\Program Files\dotnet\sdk]
5.0.408 [C:\Program Files\dotnet\sdk]
6.0.306 [C:\Program Files\dotnet\sdk] （提示已经安装了.Net SDK 6.0.306版本，替换成这个就可以。或者可以去下载安装.Net SDK 6.0.403版本）
7.0.100 [C:\Program Files\dotnet\sdk]
Install the [6.0.203] .NET SDK or update [d:\71620.org\global.json] to match an installed SDK.
Learn about SDK resolution:
https://aka.ms/dotnet/sdk-not-found