How to fix - You must install or update .NET to run this application

Question

root@ubuntu:/etc/systemd/system# /usr/bin/dotnet /var/www/MinAPI/WebApi.dll
You must install or update .NET to run this application.

App: /var/www/MinAPI/WebApi.dll
Architecture: x64
Framework: 'Microsoft.AspNetCore.App', version '5.0.0' (x64)
.NET location: /usr/lib/dotnet/

The following frameworks were found:
  7.0.5 at [/usr/lib/dotnet/shared/Microsoft.AspNetCore.App]

Learn about framework resolution:
https://aka.ms/dotnet/app-launch-failed

To install missing framework, download:
https://aka.ms/dotnet-core-applaunch?framework=Microsoft.AspNetCore.App&framework_version=5.0.0&arch=x64&rid=ubuntu.23.04-x64

Answer 1

you need to install the obsolete .net 5.0 runtime:

https://dotnet.microsoft.com/en-us/download/dotnet/5.0

or get a .net 7 build of the app.

Answer 2

how to install the .NET package on Azure bash?

Answer 3

If you are seeing this error in your Azure DevOps CI pipeline, you need to add the following task to your Yaml file, just before the build step:

- task: UseDotNet@2
  displayName: 'Use .NET 5 sdk'
  inputs:
    packageType: sdk
    version: '5.0.x'