as you can see in the title I have a C# BlazorWebApp with multiple projects and I want to release this solution to Azure via Github actions but it doesn't work.

To keep it small, I created a test-project for this and I have the same issue.

The structure of my test project:

I have one solution "MyBlazorWebApp" with two projects:

1. "MyBlazorWebApp" as default Blazor-Web-App with test pages.
2. "MyDBContext" as class library with one class "UserContext"

Class "UserContext":

namespace MyDBContext
{
    public class UserContext
    {
        public static string User { get; set; } = "MyUser";
    }
}

Later, I want to use the class "UserContext" (stored in "MyDBContext") in "MyBlazorWebApp" and then releasing it to Azure.

Until now, there is no reference between these two projects.

To test everything I created a small Web Service ("TestBlazorWebsite") in Azure and then I created a deployment plan to create my .yml file in my github storage and release the first version.

My .yml file:

I changed these values:

• client-id to ${{ secrets.MyClientID }}
• tenant-id to ${{ secrets.MyTenantID }}
• subscription-id to ${{ secrets.MySubsciptionID }}

# Docs for the Azure Web Apps Deploy action: https://github.com/Azure/webapps-deploy
# More GitHub Actions for Azure: https://github.com/Azure/actions

name: Build and deploy ASP.Net Core app to Azure Web App - TestBlazorWebsite

on:
  push:
    branches:
      - master
  workflow_dispatch:

jobs:
  build:
    runs-on: ubuntu-latest
    permissions:
      contents: read #This is required for actions/checkout

    steps:
      - uses: actions/checkout@v4

      - name: Set up .NET Core
        uses: actions/setup-dotnet@v4
        with:
          dotnet-version: '9.x'

      - name: Build with dotnet
        run: dotnet build --configuration Release

      - name: dotnet publish
        run: dotnet publish -c Release -o ${{env.DOTNET_ROOT}}/myapp

      - name: Upload artifact for deployment job
        uses: actions/upload-artifact@v4
        with:
          name: .net-app
          path: ${{env.DOTNET_ROOT}}/myapp

  deploy:
    runs-on: ubuntu-latest
    needs: build
    environment:
      name: 'Production'
      url: ${{ steps.deploy-to-webapp.outputs.webapp-url }}
    permissions:
      id-token: write #This is required for requesting the JWT
      contents: read #This is required for actions/checkout

    steps:
      - name: Download artifact from build job
        uses: actions/download-artifact@v4
        with:
          name: .net-app
      
      - name: Login to Azure
        uses: azure/login@v2
        with:
          client-id: ${{ secrets.MyClientID }}
          tenant-id: ${{ secrets.MyTenantID }}
          subscription-id: ${{ secrets.MySubsciptionID }}

      - name: Deploy to Azure Web App
        id: deploy-to-webapp
        uses: azure/webapps-deploy@v3
        with:
          app-name: 'TestBlazorWebsite'
          slot-name: 'Production'
          package: .
          

Until now, everything works fine.

So now I tried to add a project reference in "MyBlazorWebApp". project reference in "MyBlazorWebApp"

In this step I also changed the default home menu in "MyBlazorWebApp" to show the variable "User" in "UserContext". This variable is a string (= "MyUser") to test the output.

small changes in class "Home.razor"

And if I debug and test the project I get the expected output: Debugger output

But if I push the changes to github (and trigger the release to the website) I get this error message in github:

Run dotnet build --configuration Release
/usr/share/dotnet/sdk/9.0.200/NuGet.targets(498,5): error MSB3202: The project file "/home/runner/work/MyDBContext/MyDBContext.csproj" was not found. [/home/runner/work/MyBlazorWebApp/MyBlazorWebApp/MyBlazorWebApp.sln]

Build FAILED.

/usr/share/dotnet/sdk/9.0.200/NuGet.targets(498,5): error MSB3202: The project file "/home/runner/work/MyDBContext/MyDBContext.csproj" was not found. [/home/runner/work/MyBlazorWebApp/MyBlazorWebApp/MyBlazorWebApp.sln]
    0 Warning(s)
    1 Error(s)

Time Elapsed 00:00:00.53
Error: Process completed with exit code 1.

The error occurs in this step from my .yml file:

      - name: Build with dotnet
        run: dotnet build --configuration Release

My "Release"-Build-Configuration: release configuration

I dont know why the project "DBContext" isn't found. Do you have any suggestions for me?

If you have any questions, dont hesitate to comment them