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[release/11.0.1xx-preview2] Add MauiXamlHotReload property for IDE communication #34219

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[release/11.0.1xx-preview2] Add MauiXamlHotReload property for IDE communication #34219

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70e3872
Add MauiXamlHotReload property for IDE communication
StephaneDelcroix Feb 12, 2026
e1a31fa
Make MauiXamlHotReload validation case-insensitive
StephaneDelcroix Feb 24, 2026
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20 changes: 20 additions & 0 deletions ...rols/src/Build.Tasks/nuget/buildTransitive/netstandard2.0/Microsoft.Maui.Controls.targets
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,9 @@
<_MauiXamlInflator Condition="' $(MauiXamlInflator)' != '' ">$(MauiXamlInflator)</_MauiXamlInflator>
<_MauiXamlInflator Condition=" '$(MauiXamlInflator)' == '' ">SourceGen</_MauiXamlInflator>

<!-- XAML Hot Reload mode for IDE communication (Legacy or SourceGen) -->
<MauiXamlHotReload Condition="'$(MauiXamlHotReload)' == ''">Legacy</MauiXamlHotReload>

<EnableMauiXamlDiagnostics Condition=" '$(EnableMauiXamlDiagnostics)' == '' ">$(EnableMauiDiagnostics)</EnableMauiXamlDiagnostics>
<EnableMauiXamlDiagnostics Condition=" '$(EnableMauiXamlDiagnostics)' == '' And '$(Configuration)' == 'Debug' ">$(EnableDiagnostics)</EnableMauiXamlDiagnostics>
<EnableMauiXamlDiagnostics Condition=" '$(EnableMauiXamlDiagnostics)' == '' And '$(Configuration)' == 'Debug' ">true</EnableMauiXamlDiagnostics>
Expand Down Expand Up @@ -73,6 +76,23 @@
Condition="'$(_MauiTargetsImportedAgain)' == 'True'" />
</Target>

<!-- Validate MauiXamlHotReload values (case-insensitive) -->
<Target Name="_ValidateMauiXamlHotReload" BeforeTargets="_CheckForInvalidConfigurationAndPlatform">
<PropertyGroup>
<_MauiXamlHotReloadUpper>$([System.String]::Copy('$(MauiXamlHotReload)').Trim().ToUpperInvariant())</_MauiXamlHotReloadUpper>
</PropertyGroup>

<Warning
Code="MAUI1002"
Text="MauiXamlHotReload is set to 'SourceGen'. Source generator-based XAML Hot Reload is experimental and not yet fully implemented. Use at your own risk."
Condition="'$(_MauiXamlHotReloadUpper)' == 'SOURCEGEN'" />

<Warning
Code="MAUI1003"
Text="MauiXamlHotReload is set to an unrecognized value '$(MauiXamlHotReload)'. Supported values are 'Legacy' and 'SourceGen'."
Condition="'$(_MauiXamlHotReloadUpper)' != '' and '$(_MauiXamlHotReloadUpper)' != 'SOURCEGEN' and '$(_MauiXamlHotReloadUpper)' != 'LEGACY'" />
</Target>

<Target Name="_ValidateMSBuild" BeforeTargets="_CheckForInvalidConfigurationAndPlatform">
<Error Code="XF003"
Text="Microsoft.Maui requires msbuild. xbuild is no longer supported."
Expand Down
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