• Client.Core - All meaningful UI code goes here. Shared between Maui and Web site. Includes wwwroot and all razor controls.
• Client.Maui - Builds native UIs for iOS, Android, Windows, Mac. wwwroot only for index.html, everything referenced via Core.
• Client.Web - web site that hosts Blazor WebAssembly. Same wwwroot caveat as Maui.
• Server.API - .NET 6 in-process Azure Function.
• Common - Minimal class library for data transfer objects and business logic that is shared between client & server; targets .NET 6 and 7.

Requirements

• .NET 7 for the frontend
• .NET 6 for the Azure Function Server.API
• Android Studio & Android v33
• A Mac for iOS & MacOS builds

You can build everything but Apple stuff with the two Dockerfiles in root...but this is just a starting point for CI, you can't launch the solution.

docker build -t mauibuild - < Dockerfile-mauibuild
docker build .

Client.Maui.csproj. Note the conditional builds depending on OS.

    <PropertyGroup>
        <TargetFrameworks>net7.0-android</TargetFrameworks>
        <TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('windows'))">$(TargetFrameworks);net7.0-windows10.0.19041.0</TargetFrameworks>
        <TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('freebsd'))">$(TargetFrameworks);net7.0-ios;net7.0-maccatalyst</TargetFrameworks>

• https://www.telerik.com/blogs/sharing-code-blazor-dotnet-maui - This helped me get the fiddly bits working, but I prefer my naming conventions.

• The frontend doesn't actually call the backend, so I don't know if the Common project is necessary, or if repeating contract classes is easier with codegen.