1、报错如下：

Common solutions to this issue: 
The specified version of Microsoft.NetCore.App or Microsoft.AspNetCore.App was not found. 
Specific error detected by ANCM:

It was not possible to find any compatible framework version The framework 'Microsoft.AspNetCore.App', version '2.2.0' was not found.
- The following frameworks were found:
2.1.27 at [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
3.1.14 at [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
5.0.5 at [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] 
You can resolve the problem by installing the specified framework and/or SDK. 
The specified framework can be found at:- https://aka.ms/dotnet-core-applaunch?framework=Microsoft.AspNetCore.App&framework_version=2.2.0&arch=x64&rid=win10-x64 

2、复制链接：https://aka.ms/dotnet-core-applaunch?framework=Microsoft.AspNetCore.App&framework_version=2.2.0&arch=x64&rid=win10-x64

3、上面表示已经不支持2.2了，此时需要单击Download链接

4、单击All.Net downloads，再点开Out of support versions，出现下图

5、单击Net Core2.2，并滚动页面到如下图所示位置，下载Asp.NET Core Runtime2.2.0中的Windows中的X64和Net Runtime 2.2.0中Windows下的X64，然后安装，这个版本根据

自身的平台情况选择。