Fix .NET Version in Azure Cloud Shell

[huihui0310tt]

[last edit: Aug. 29, 2023]

The Cloud Shell is not compatible with this framework version. To resolve this issue, update the .NET version to 7.0.

Environment: Azure Cloud Shell

Reproduce error environment:

1. Upload a .NET webpage to the WebApp.

   git clone https://github.com/MicrosoftDocs/mslearn-hotel-reservation-system.git
cd mslearn-hotel-reservation-system/src
dotnet build
cd HotelReservationSystem
dotnet publish -o website
cd website
zip website.zip *
az webapp deployment source config-zip --src website.zip --name <your-webapp-name> --resource-group <your-rg-name>

2. Configure WebApp URL.
   cd ~/mslearn-hotel-reservation-system/src/HotelReservationSystemTestClient
code App.config
### Continue Setting Configuration for WebApp url ###

3. Based on the hint in Microsoft Learn and the issue in this repository, change the .NET version to 6.0.
   code HotelReservationSystemTestClient.csproj
### Setting TargetFramework from netcoreapp2.1 to netcoreapp6.0 ###

4. After running dotnet build and dotnet run, you may receive the following error log:

You must install or update .NET to run this application.

App: /home/yan-hui/mslearn-hotel-reservation-system/src/HotelReservationSystemTestClient/bin/Debug/netcoreapp6.0/HotelReservationSystemTestClient
Architecture: x64
Framework: 'Microsoft.NETCore.App', version '6.0.0' (x64)
.NET location: /usr/share/dotnet

The following frameworks were found:
  7.0.9 at [/usr/share/dotnet/shared/Microsoft.NETCore.App]
  7.0.10 at [/usr/share/dotnet/shared/Microsoft.NETCore.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.NETCore.App&framework_version=6.0.0&arch=x64&rid=mariner.2.0-x64

Solution:

Install .Net 7
Reference: dotnet-install

1. Install Package

   wget https://dot.net/v1/dotnet-install.sh -O dotnet-install.sh
chmod +x ./dotnet-install.sh
./dotnet-install.sh --channel 7.0

2. Change the .NET version to 7.0.
   code HotelReservationSystemTestClient.csproj
### Setting TargetFramework from netcoreapp6.0 to netcoreapp7.0 ###

3. After installing .NET 7, you can continue to perform flow tests.
   dotnet build
dotnet run