Bump .NET version to 7.0

[stephen-hawley]

Yes, this is a large PR. I tried to make each commit its own story, so in reviewing this you should probably go through each commit rather than trying to look at the whole.

This PR moves Binding Tools for Swift from Mono to .NET 7.0
The changes fall into a few categories:

• updating various constants to reflect the current build environment
• updating makefiles to use dotnet to build things
• updating code to use dotnet to compile C# code
• updating library code to use [UnmanagedCallersOnly]
• updating generation code to use [UnmanagedCallersOnly]
• updating generation code to use delegate *unmanaged<...> syntax
• updating dynamo to make changes easier

In its current state 1416 tests pass and 175 fail. Those that fail fall into the following categories:

• crashing when running as a macOS app (cause TBD)
• tests that require tables for generic types: [UnmanagedCallersOnly] can't appear in generic types
• tests that was NativeHandle for ClassHandle
• tests that are looking for the wrong SDK
• tests that are not finding XamGlue (yet)

In addition iPhone/iPad tests don't happen (yet). At this point, I want to get this PR in so I focus on getting things running so I don't hold up @kotlarmilos

[rolfbjarne]

This doesn't look right, you shouldn't be referencing Xamarin.Mac.dll anymore (you should automatically get a reference to Microsoft.macOS.dll because TargetFramework=net7.0-macos).

[stephen-hawley]

This got managed in a later commit.

[mcumming]

Only reviewed the csroj files so far, but I'll come back for the rest later. Also check to make sure your Before* and After* targets are actually running. IIRC, those targets do not run if defined in an SDK style project, you have to configure them differently. See https://learn.microsoft.com/en-us/visualstudio/msbuild/how-to-extend-the-visual-studio-build-process?view=vs-2022#example-aftertargets-and-beforetargets

[mcumming]

Why use a binary reference instead of a project reference?

[stephen-hawley]

Likely because this was set up by vsmac years ago and was hit by the migration tool. I wouldn't worry too much about PigLatin - it's likely going to go away/get rebuilt from scratch as a sample.

[mcumming]

This should be converted to a .editorconfig and removed from here.

[mcumming]

This is a default and can be removed

[mcumming]

This is a default and can be removed

[mcumming]

This is duplicated for both configurations, move it to a common PropertyGroup

[mcumming]

This can probably be removed

[mcumming]

You may want to consider migrating this to match the MAUI project templates over the migrated Xamarin.Forms template:
`

<PropertyGroup>
	<TargetFrameworks>net9.0-android;net9.0-ios;net9.0-maccatalyst</TargetFrameworks>
	<TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('windows'))">$(TargetFrameworks);net9.0-windows10.0.19041.0</TargetFrameworks>
	<!-- Uncomment to also build the tizen app. You will need to install tizen by following this: https://github.com/Samsung/Tizen.NET -->
	<!-- <TargetFrameworks>$(TargetFrameworks);net6.0-tizen</TargetFrameworks> -->
	<OutputType>Exe</OutputType>
	<RootNamespace>MauiTest</RootNamespace>
	<UseMaui>true</UseMaui>
	<SingleProject>true</SingleProject>
	<ImplicitUsings>enable</ImplicitUsings>

	<!-- Display name -->
	<ApplicationTitle>MauiTest</ApplicationTitle>

	<!-- App Identifier -->
	<ApplicationId>com.companyname.mauitest</ApplicationId>
	<ApplicationIdGuid>c8937955-7050-4e07-9013-1bda386aa558</ApplicationIdGuid>

	<!-- Versions -->
	<ApplicationDisplayVersion>1.0</ApplicationDisplayVersion>
	<ApplicationVersion>1</ApplicationVersion>

	<SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'ios'">14.2</SupportedOSPlatformVersion>
	<SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'maccatalyst'">14.0</SupportedOSPlatformVersion>
	<SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'android'">21.0</SupportedOSPlatformVersion>
	<SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'windows'">10.0.17763.0</SupportedOSPlatformVersion>
	<TargetPlatformMinVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'windows'">10.0.17763.0</TargetPlatformMinVersion>
	<SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'tizen'">6.5</SupportedOSPlatformVersion>
</PropertyGroup>

<PropertyGroup>
	<MtouchLink>SdkOnly</MtouchLink>
</PropertyGroup>

<ItemGroup>
	<PackageReference Include="Microsoft.Maui.Controls" Version="9.0.0-ci.net9.9888" />
</ItemGroup>

<ItemGroup>
	<!-- App Icon -->
	<MauiIcon Include="Resources\AppIcon\appicon.svg" ForegroundFile="Resources\AppIcon\appiconfg.svg" Color="#512BD4" />

	<!-- Splash Screen -->
	<MauiSplashScreen Include="Resources\Splash\splash.svg" Color="#512BD4" BaseSize="128,128" />

	<!-- Images -->
	<MauiImage Include="Resources\Images\*" />
	<MauiImage Update="Resources\Images\dotnet_bot.svg" BaseSize="168,208" />

	<!-- Custom Fonts -->
	<MauiFont Include="Resources\Fonts\*" />

	<!-- Raw Assets (also remove the "Resources\Raw" prefix) -->
	<MauiAsset Include="Resources\Raw\**" LogicalName="%(RecursiveDir)%(Filename)%(Extension)" />
</ItemGroup>

`

[stephen-hawley]

I expect the samples to be redone entirely.

[mcumming]

Not sure what this next ItemGroup accomplishes. Why are all these files being removed from the project? If it is correct, please convert to globbing patterns to reduce the noise.

[mcumming]

💯

[mcumming]

Why is this file being removed? Add a comment, or if it is no longer used entirely, delete the file.