vscode unity omnisharp 配置问题，折腾两天终于解决了

一怒之下我恢复了电脑的出厂设置，重新配置一遍后还是报错，

Could not locate MSBuild instance to register with OmniSharp.

The .NET Core SDK cannot be located.

The .NET Core SDK cannot be located: A valid dotnet installation could not be found. .NET Core debugging will not be enabled. Make sure the .NET Core SDK is installed and is on the path.

反正就是VSCode的omnisharp找不到net framework的问题

最后不知道怎么稀里糊涂就解决了，最后解决时的状态是这样的：

.net 下载的是最新的7.0，但是我忘了是用户版还是开发者版了，我猜是开发者版
.net下载

插件被我杀的还剩这几个：

控制台写dotnet --info输出的是这样的

C:\Users\user马赛克>dotnet --info .NET SDK: Version: 7.0.102 Commit:
4bbdd14480

运行时环境: OS Name: Windows OS Version: 10.0.19044 OS Platform:
Windows RID: win10-x64 Base Path: C:\Program
Files\dotnet\sdk\7.0.102\

Host: Version: 7.0.2 Architecture: x64 Commit:
d037e070eb

.NET SDKs installed:
7.0.102 [C:\Program Files\dotnet\sdk]

.NET runtimes installed: Microsoft.AspNetCore.App 7.0.2 [C:\Program
Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.NETCore.App
7.0.2 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.WindowsDesktop.App 7.0.2 [C:\Program
Files\dotnet\shared\Microsoft.WindowsDesktop.App]

Other architectures found: None

Environment variables: Not set

global.json file: Not found

Learn more: https://aka.ms/dotnet/info

Download .NET: https://aka.ms/dotnet/download

vscode的setting.json里被我删光了，一个字没有：

也就是说
omnisharp:path写的""（空），
omnisharp : use modern net 写的true
omnisharp : dotnet path 是空
omnisharp : sdk path 还是空

.omnisharp文件夹里有两个版本，也不知道哪个是正确的，我猜测是第二个1.39.2-net6.0
还下载了一个framework4.7.1，不知道有没有起到关键作用。我猜是有的，解决了vscode它向我要framework4.7.1的问题

最后成果是这样的：

总结：framework4.7.1，.net7.0，omnisharp设置全默认

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