Migrating from Preview 9 to 10

csproj

Windows changes

Windows is now supported by default. Update the Windows references:

<PropertyGroup>
	<TargetFrameworks>net6.0-android;net6.0-ios;net6.0-maccatalyst</TargetFrameworks>
	<TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('windows')) and '$(MSBuildRuntimeType)' == 'Full'">$(TargetFrameworks);net6.0-windows10.0.19041</TargetFrameworks>
	...
</PropertyGroup>

Replace your Windows package references with the these two:

<ItemGroup Condition="$(TargetFramework.Contains('-windows'))">
	<!-- Required - WinUI does not yet have buildTransitive for everything -->
	<PackageReference Include="Microsoft.WindowsAppSDK" Version="1.0.0-preview3" />
	<PackageReference Include="Microsoft.Graphics.Win2D" Version="1.0.0.29-preview3" />
</ItemGroup>

Update SupportedOSPlatformVersion and add new TargetPlatformMinVersion in the first <PropertyGroup>.

<SupportedOSPlatformVersion Condition="$(TargetFramework.Contains('-windows'))">10.0.17763.0</SupportedOSPlatformVersion>
<TargetPlatformMinVersion Condition="$(TargetFramework.Contains('-windows'))">10.0.17763.0</TargetPlatformMinVersion>

Update the RuntimeIdentifier:

<PropertyGroup Condition="$(TargetFramework.Contains('-windows'))">
	<OutputType>WinExe</OutputType>
	<RuntimeIdentifier>win10-x64</RuntimeIdentifier>
</PropertyGroup>

New MauiIcon

For the app icon, update your <MauiImage IsAppIcon="True"> to use the new type <MauiIcon />.

<MauiIcon Include="Resources\appicon.svg" ForegroundFile="Resources\appiconfg.svg" Color="#512BD4" />

Optional Updates

Our new templates have now adopted .NET 6-isms such as global using and document level namespaces.