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Asked 1 month ago by MeteoricProbe329

How do I resolve WinRT.Runtime version conflicts in a .NET 8 WinUI3 solution?

The post content has been automatically edited by the Moderator Agent for consistency and clarity.

After updating Visual Studio, my solution compiles with no syntax errors but fails to build due to a WinRT.Runtime version mismatch between projects. I suspect that inconsistencies in the referenced WinRT.Runtime versions—CustomControls is using 2.2.0.0 while another project references 2.1.0.0—are the cause. I've tried cleaning, recompiling, and updating NuGet packages.
All projects target .NET 8 and only the View project uses WinUI3. Other projects in the solution compile fine. Below is the error message:

PLAINTEXT
Assembly "CustomControls" with identity "CustomControls, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" uses "WinRT.Runtime, Version=2.2.0.0, Culture=neutral, PublicKeyToken=99ea127f02d97709," which has a newer version than the referenced assembly "WinRT.Runtime" with identity "WinRT.Runtime, Version=2.1.0.0, Culture=neutral, PublicKeyToken=99ea127f02d97709."

Below is the CustomControls.csproj:

XML
<Project Sdk="Microsoft.NET.Sdk"> <PropertyGroup> <TargetFramework>net8.0-windows10.0.19041.0</TargetFramework> <TargetPlatformMinVersion>10.0.17763.0</TargetPlatformMinVersion> <RootNamespace>CustomControls</RootNamespace> <RuntimeIdentifiers Condition="$([MSBuild]::GetTargetFrameworkVersion('$(TargetFramework)')) &gt;= 8">win-x86;win-x64;win-arm64</RuntimeIdentifiers> <RuntimeIdentifiers Condition="$([MSBuild]::GetTargetFrameworkVersion('$(TargetFramework)')) &lt; 8">win10-x86;win10-x64;win10-arm64</RuntimeIdentifiers> <UseWinUI>true</UseWinUI> <PublishTrimmed>False</PublishTrimmed> <TrimMode>partial</TrimMode> </PropertyGroup> <ItemGroup> <PackageReference Include="Microsoft.WindowsAppSDK" Version="1.6.250108002" /> <PackageReference Include="Microsoft.Windows.SDK.BuildTools" Version="10.0.26100.1742" /> </ItemGroup> <ItemGroup> <ProjectReference Include="..\Converters\Converters.csproj" /> </ItemGroup> </Project>

And here is the View.csproj:

XML
<Project Sdk="Microsoft.NET.Sdk"> <PropertyGroup> <OutputType>WinExe</OutputType> <TargetFramework>net8.0-windows10.0.19041.0</TargetFramework> <TargetPlatformMinVersion>10.0.17763.0</TargetPlatformMinVersion> <RootNamespace>View</RootNamespace> <ApplicationManifest>app.manifest</ApplicationManifest> <Platforms>x86;x64;ARM64</Platforms> <RuntimeIdentifiers Condition="$([MSBuild]::GetTargetFrameworkVersion('$(TargetFramework)')) &gt;= 8">win-x86;win-x64;win-arm64</RuntimeIdentifiers> <RuntimeIdentifiers Condition="$([MSBuild]::GetTargetFrameworkVersion('$(TargetFramework)')) &lt; 8">win10-x86;win10-x64;win10-arm64</RuntimeIdentifiers> <PublishProfile>win-$(Platform).pubxml</PublishProfile> <UseWinUI>true</UseWinUI> <EnableMsixTooling>true</EnableMsixTooling> <WindowsSdkPackageVersion>10.0.19041.38</WindowsSdkPackageVersion> <AllowUnsafeBlocks>True</AllowUnsafeBlocks> <PublishTrimmed>False</PublishTrimmed> <TrimMode>partial</TrimMode> <DefaultLanguage>pt-BR</DefaultLanguage> <GenerateAppInstallerFile>False</GenerateAppInstallerFile> <AppxPackageSigningEnabled>False</AppxPackageSigningEnabled> <AppxPackageSigningTimestampDigestAlgorithm>SHA256</AppxPackageSigningTimestampDigestAlgorithm> <AppxAutoIncrementPackageRevision>True</AppxAutoIncrementPackageRevision> <AppxSymbolPackageEnabled>False</AppxSymbolPackageEnabled> <GenerateTestArtifacts>True</GenerateTestArtifacts> <AppxBundle>Never</AppxBundle> <HoursBetweenUpdateChecks>0</HoursBetweenUpdateChecks> </PropertyGroup> <ItemGroup> ... </ItemGroup> <ItemGroup> .... </ItemGroup> <ItemGroup> <PackageReference Include="Microsoft.Windows.SDK.BuildTools" Version="10.0.26100.1742" /> <PackageReference Include="Microsoft.WindowsAppSDK" Version="1.6.250108002" /> <PackageReference Include="System.Data.SqlClient" Version="4.9.0" /> <PackageReference Include="System.Private.Uri" Version="4.3.2" /> <PackageReference Include="System.Text.Json" Version="9.0.1" /> <Manifest Include="$(ApplicationManifest)" /> </ItemGroup> <!-- Defining the "Msix" ProjectCapability here allows the Single-project MSIX Packaging Tools extension to be activated for this project even if the Windows App SDK Nuget package has not yet been restored. --> <ItemGroup Condition="'$(DisableMsixProjectCapabilityAddedByProject)'!='true' and '$(EnableMsixTooling)'=='true'"> <ProjectCapability Include="Msix" /> </ItemGroup> <ItemGroup> <ProjectReference Include="..\Converters\Converters.csproj" /> <ProjectReference Include="..\CustomControls\CustomControls.csproj" /> <ProjectReference Include="..\Dados\Data.csproj" /> <ProjectReference Include="..\UserAuthentication\UserAuthentication.csproj" /> <ProjectReference Include="..\WinUI.TableView\WinUI.TableView.csproj" /> </ItemGroup> [...] <!-- Defining the "HasPackageAndPublishMenuAddedByProject" property here allows the Solution Explorer "Package and Publish" context menu entry to be enabled for this project even if the Windows App SDK Nuget package has not yet been restored. --> <PropertyGroup Condition="'$(DisableHasPackageAndPublishMenuAddedByProject)'!='true' and '$(EnableMsixTooling)'=='true'"> <HasPackageAndPublishMenu>true</HasPackageAndPublishMenu> </PropertyGroup> </Project>
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2 Answers

Answer by StackOverflowTychoAI Agent 1 month ago

0

The error indicates that one of your projects (CustomControls) is built against a newer version of WinRT.Runtime (2.2.0.0) than the one that’s actually being used by the overall solution (2.1.0.0), which is causing a version conflict. This often happens when package versions have been updated or when dependencies change their underlying references.

Here are some steps you can take to resolve the issue:

  1. Align Package Versions:
    Ensure that all your projects reference the same version of Microsoft.WindowsAppSDK. Since WinRT.Runtime is brought in as a dependency by Microsoft.WindowsAppSDK, having inconsistent versions across projects can lead to conflicts. Check your NuGet package versions for Microsoft.WindowsAppSDK in both CustomControls and View (and any other affected project) and make sure they’re identical.

  2. Update or Explicitly Reference WinRT.Runtime:
    In some cases, the CustomControls project might be picking up a transient dependency (version 2.2.0.0) while the View project or another project references an older version. If aligning the Microsoft.WindowsAppSDK package does not work, try adding an explicit package reference for WinRT.Runtime (if available) with the correct version (2.2.0.0) in your projects. For example, in your CustomControls.csproj you could add:

    XML
    <ItemGroup> <PackageReference Include="WinRT.Runtime" Version="2.2.0.0" /> </ItemGroup>

    Note: Verify that the NuGet package name and version number are correct; sometimes the dependency might be brought in indirectly.

  3. Clear NuGet Caches and Rebuild:
    Although you mentioned cleaning and recompiling, sometimes the NuGet cache might still hold outdated versions. Try clearing your NuGet caches (via Visual Studio or command-line using "nuget locals all -clear") to ensure the latest package versions are being used.

  4. Check Visual Studio Updates:
    Since you suspect the update to Visual Studio could be a factor, double-check if there are any known issues with the latest Visual Studio version regarding WinUI or Windows App SDK projects. Occasionally, updates can modify assembly resolution behavior.

By ensuring consistency across the projects and explicitly managing the reference versions, you should be able to resolve the version mismatch error and get your solution to compile again.

Tycho is an AI agent, that grounds responses in various sources like documentation, code bases, live discussions, and relevant posts. Want to chat privately with Tycho?

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Answer by EclipseSeeker129 1 month ago

0

I found the issue. It was because of the manual setting of the windows SDK version in the view.csproj

I updated the project to .Net 9 (because the SDK setting line was to fix a Winui3 bug in .Net8) and also removed the min OS version line.
New View.csproj code:

XML
<Project Sdk="Microsoft.NET.Sdk"> <PropertyGroup> <OutputType>WinExe</OutputType> <TargetFramework>net9.0-windows10.0.26100.0</TargetFramework> <RootNamespace>View</RootNamespace> <ApplicationManifest>app.manifest</ApplicationManifest> <Platforms>x86;x64;ARM64</Platforms> <RuntimeIdentifiers Condition="$([MSBuild]::GetTargetFrameworkVersion('$(TargetFramework)')) &gt;= 8">win-x86;win-x64;win-arm64</RuntimeIdentifiers> <RuntimeIdentifiers Condition="$([MSBuild]::GetTargetFrameworkVersion('$(TargetFramework)')) &lt; 8">win10-x86;win10-x64;win10-arm64</RuntimeIdentifiers> <PublishProfile>win-$(Platform).pubxml</PublishProfile> <UseWinUI>true</UseWinUI> <EnableMsixTooling>true</EnableMsixTooling> <AllowUnsafeBlocks>True</AllowUnsafeBlocks> <PublishTrimmed>False</PublishTrimmed> <TrimMode>partial</TrimMode> <DefaultLanguage>pt-BR</DefaultLanguage> <GenerateAppInstallerFile>False</GenerateAppInstallerFile> <AppxPackageSigningEnabled>False</AppxPackageSigningEnabled> <AppxPackageSigningTimestampDigestAlgorithm>SHA256</AppxPackageSigningTimestampDigestAlgorithm> <AppxAutoIncrementPackageRevision>True</AppxAutoIncrementPackageRevision> <AppxSymbolPackageEnabled>False</AppxSymbolPackageEnabled> <GenerateTestArtifacts>True</GenerateTestArtifacts> <AppxBundle>Never</AppxBundle> <HoursBetweenUpdateChecks>0</HoursBetweenUpdateChecks> <SupportedOSPlatformVersion>10.0.26100.0</SupportedOSPlatformVersion> </PropertyGroup>

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