My web app only works on .Net6

Question

My web app only works on .Net6

Kev Martin 0

I am only able to install a version of my web app which uses .Net 6.0. When I try to install my .Net version of the app it does not start.

My resource group is as follows

User's image

Is this a limitation of my resource group? Do I have to upgrade the pricing plan or switch to Windows in order to run .Net8?

Harshitha Veeramalla 421 Reputation points Microsoft External Staff

2025-02-20T10:36:35.2833333+00:00

Hi @Kev Martin ,
It is a Web App or StaticWebApp?
Kev Martin 0 Reputation points

2025-02-20T11:25:15.96+00:00

Hi, it is a Web App

Kev Martin 0

I upload as part of a pipeline, this is the code

- task: Docker@2
  displayName: 'buildAndPush'
  inputs:
    containerRegistry: DockerConnection
    repository: appstorageaccount
    Dockerfile: appWorld/Dockerfile
    tags: latest

This is the docker file

FROM mcr.microsoft.com/dotnet/aspnet:6.0 AS base
WORKDIR /app
EXPOSE 80
EXPOSE 443
FROM mcr.microsoft.com/dotnet/sdk:6.0 AS build
WORKDIR /src
COPY ["appWorld.csproj", "./"]
RUN dotnet restore "appWorld.csproj"
COPY . .
WORKDIR "/src/."
RUN dotnet build "appWorld.csproj" -c Release -o /app/build
FROM build AS publish
RUN dotnet publish "appWorld.csproj" -c Release -o /app/publish
FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "appWorld.dll"]

Prabhavathi Manchala 80 Reputation points Microsoft External Staff

2025-03-12T02:48:11.1+00:00

Hi Kev Martin,

We haven’t heard from you on the last response and was just checking back to see if you have a resolution yet. In case if you have any resolution please do share that same with the community as it can be helpful to others. Otherwise, will respond with more details and we will try to help.
Prabhavathi Manchala 80 Reputation points Microsoft External Staff

2025-03-13T00:48:39.3633333+00:00

Hi Kev Martin,

We haven’t heard from you on the last response and was just checking back to see if you have a resolution yet. In case if you have any resolution please do share that same with the community as it can be helpful to others. Otherwise, will respond with more details and we will try to help.

1 answer

Your answer

Harshitha Veeramalla 421 Reputation points Microsoft External Staff

2025-02-20T10:36:35.2833333+00:00

Hi @Kev Martin ,
It is a Web App or StaticWebApp?
Kev Martin 0 Reputation points

2025-02-20T11:25:15.96+00:00

Hi, it is a Web App
Kev Martin 0 Reputation points

2025-02-20T20:44:56.1833333+00:00

I upload as part of a pipeline, this is the code

- task: Docker@2 displayName: 'buildAndPush' inputs: containerRegistry: DockerConnection repository: appstorageaccount Dockerfile: appWorld/Dockerfile tags: latest

This is the docker file

FROM mcr.microsoft.com/dotnet/aspnet:6.0 AS base WORKDIR /app EXPOSE 80 EXPOSE 443 FROM mcr.microsoft.com/dotnet/sdk:6.0 AS build WORKDIR /src COPY ["appWorld.csproj", "./"] RUN dotnet restore "appWorld.csproj" COPY . . WORKDIR "/src/." RUN dotnet build "appWorld.csproj" -c Release -o /app/build FROM build AS publish RUN dotnet publish "appWorld.csproj" -c Release -o /app/publish FROM base AS final WORKDIR /app COPY --from=publish /app/publish . ENTRYPOINT ["dotnet", "appWorld.dll"]
Prabhavathi Manchala 80 Reputation points Microsoft External Staff

2025-03-12T02:48:11.1+00:00

Hi Kev Martin,

We haven’t heard from you on the last response and was just checking back to see if you have a resolution yet. In case if you have any resolution please do share that same with the community as it can be helpful to others. Otherwise, will respond with more details and we will try to help.
Prabhavathi Manchala 80 Reputation points Microsoft External Staff

2025-03-13T00:48:39.3633333+00:00

Hi Kev Martin,

We haven’t heard from you on the last response and was just checking back to see if you have a resolution yet. In case if you have any resolution please do share that same with the community as it can be helpful to others. Otherwise, will respond with more details and we will try to help.

Answer 1

Hi Kev Martin,

If your app currently works on .NET 6.0, the problem could be due to the App Service plan or the operating system configuration.

You can review the pricing plan, as the pricing tier of your App Service plan can influence the available features and runtimes. If you are on a free or lower-tier plan, it may not support the latest .NET versions. Consider upgrading to a higher pricing tier that supports .NET 8.0.

If you are using a Linux-based App Service, verify whether .NET 8.0 is supported on that OS. If it is not supported, you may need to switch to a Windows-based App Service to run .NET 8.0 applications.

Make sure that your App Service configuration is correctly set up to use .NET 8.0.

You can configure the .NET Core version using the Azure CLI with the following command

az webapp config set --name <app-name> --resource-group <resource-group-name> --linux-fx-version "DOTNETCORE|8.0"

Make sure to replace <app-name> and <resource-group-name> with your actual app and resource group names.

Kindly refer below document

https://learn.microsoft.com/en-us/azure/app-service/configure-language-dotnetcore?pivots=platform-linux

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My web app only works on .Net6

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