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knowledge-base/dpl-version-conflict-detected-telerik-zip.md
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| title: Version Conflict Detected for Telerik.Zip | ||
| description: Learn how to fix a NuGet version conflict error that may occur when using different incompatible versions of Telerik UI for Blazor and Telerik Document Processing in the same Blazor project. | ||
| type: troubleshooting | ||
| page_title: How to Fix Version Conflict Detected Error for Telerik.Zip | ||
| slug: dpl-kb-version-conflict-detected-telerik-zip | ||
| tags: telerik, blazor, dpl, document processing | ||
| ticketid: 1666834, 1663672, 1652709, 1651020, 1649684, 1647998, 1647404, 1646717 | ||
| res_type: kb | ||
| --- | ||
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| ## Environment | ||
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| <table> | ||
| <tbody> | ||
| <tr> | ||
| <td>Product</td> | ||
| <td>UI for Blazor <br /> Telerik Document Processing</td> | ||
| </tr> | ||
| </tbody> | ||
| </table> | ||
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| ## Description | ||
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| Visual Studio and the .NET SDK throw an error if incompatible versions of Telerik UI for Blazor and Telerik Document Processing are used in the same project. | ||
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| ## Error Message | ||
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| <div class="skip-repl"></div> | ||
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| ``` | ||
| Error NU1107: Version conflict detected for Telerik.Zip. Install/reference Telerik.Zip ... directly to project ... to resolve this issue. | ||
| ``` | ||
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| or | ||
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| <div class="skip-repl"></div> | ||
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| ``` | ||
| Warning NU1605: Detected package downgrade: Telerik.Zip from ... to .... Reference the package directly from the project to select a different version. | ||
| ``` | ||
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| ## Cause | ||
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| Telerik UI for Blazor (the `Telerik.UI.for.Blazor` NuGet package) depends on the `Telerik.Documents.SpreadsheetStreaming` NuGet package in order to support [Grid Excel export]({%slug grid-export-excel%}). On the other hand, `Telerik.Documents.SpreadsheetStreaming` depends on `Telerik.Zip`. | ||
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| Most [Telerik Document Processing]({%slug dpl-in-blazor%}) NuGet packages depend on `Telerik.Documents.Core`, which also depends on `Telerik.Zip`. | ||
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| In other words, `Telerik.Zip` is a transitive dependency of multiple other Telerik NuGet packages. | ||
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| Telerik UI for Blazor and Telerik Document Processing use different release cycles. As a result, the latest version of Telerik UI for Blazor may not be compatible with the latest version of Telerik Document Processing. | ||
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| [Error `NU1107 Version conflict detected for Telerik.Zip`](https://learn.microsoft.com/en-us/nuget/reference/errors-and-warnings/nu1605) occurs when an older Telerik UI for Blazor version is used together with a newer Telerik Document Processing version. As a result, `Telerik.UI.for.Blazor` expects an older `Telerik.Zip` version than what the project has resolved. | ||
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| [Warning `NU1605 Detected package downgrade: Telerik.Zip`](https://learn.microsoft.com/en-us/nuget/reference/errors-and-warnings/nu1605) occurs when a newer Telerik UI for Blazor version is used together with a older Telerik Document Processing version. As a result, `Telerik.UI.for.Blazor` expects a newer `Telerik.Zip` version than what the project has resolved. | ||
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| ## Solution | ||
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| There are several ways to fix the NuGet conflict errors: | ||
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| * [Upgrade Telerik UI for Blazor]({%slug upgrade-tutorial%}), if some [newer version is available](https://www.telerik.com/support/whats-new/blazor-ui/release-history). | ||
| * Downgrade Telerik Document Processing to the older version that `Telerik.UI.for.Blazor` expects for `Telerik.Zip`. | ||
| * [Reference the newer version of `Telerik.Zip` explicitly in the project.](#reference-the-telerikzip-package-explicitly) | ||
| * [Reference the newer version of `Telerik.Documents.SpreadsheetStreaming` explicitly in the project.](#reference-the-telerikdocumentsspreadsheetstreaming-package-explicitly) | ||
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| The ultimate goal is all Telerik NuGet packages in the app to use the same version of `Telerik.Zip`. | ||
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| ### Upgrade or Downgrade NuGet Package Versions | ||
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| 1. Refer to the [release notes for your Telerik UI for Blazor version](https://www.telerik.com/support/whats-new/blazor-ui/release-history). | ||
| 2. Check the required and compatible version of Telerik Document Processing. For example, [Telerik UI for Blazor 6.2.0 depends on Telerik Document Processing 2024.3.806](https://www.telerik.com/support/whats-new/blazor-ui/release-history/ui-for-blazor-6-2-0). | ||
| 3. Upgrade Telerik UI for Blazor. Alternatively, downgrade Telerik Document Processing. | ||
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| ### Reference the Telerik.Zip Package Explicitly | ||
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| Register the newer `Telerik.Zip` NuGet package version explicitly in the project, which will force Telerik UI for Blazor to use that version instead. The referenced `Telerik.Zip` version must match the version of the other Telerik Document Processing packages in the project. The resulting output in the `.csproj` file will be similar to the one below. | ||
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| >caption Project file | ||
| <div class="skip-repl"></div> | ||
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| ````HTML | ||
| <ItemGroup> | ||
| <PackageReference Include="Telerik.UI.for.Blazor" Version="AA.BB.CC" /> | ||
| <PackageReference Include="Telerik.Zip" Version="ZZ.YY.XX" /> | ||
| <PackageReference Include="Telerik.Documents.Spreadsheet" Version="ZZ.YY.XX" /> | ||
| <PackageReference Include="Telerik.Documents.Spreadsheet.FormatProviders.OpenXml" Version="ZZ.YY.XX" /> | ||
| </ItemGroup> | ||
| ```` | ||
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| This approach will generate a [NuGet Warning NU1608](https://learn.microsoft.com/en-us/nuget/reference/errors-and-warnings/nu1608), but the application will be able to compile and run. | ||
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| >caption NuGet Warning NU1608 | ||
| <div class="skip-repl"></div> | ||
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| ``` | ||
| NU1608: Detected package version outside of dependency constraint: Telerik.Documents.SpreadsheetStreaming ... requires Telerik.Zip ... but version Telerik.Zip ... was resolved. | ||
| ``` | ||
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| ### Reference the Telerik.Documents.SpreadsheetStreaming Package Explicitly | ||
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| Register the newer `Telerik.Documents.SpreadsheetStreaming` NuGet package version explicitly in the project, which will force Telerik UI for Blazor to use that version instead. The referenced `Telerik.Documents.SpreadsheetStreaming` version must match the version of the other Telerik Document Processing packages in the project. The resulting output in the `.csproj` file will be similar to the one below. | ||
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| >caption Project file | ||
| <div class="skip-repl"></div> | ||
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| ````HTML | ||
| <ItemGroup> | ||
| <PackageReference Include="Telerik.UI.for.Blazor" Version="AA.BB.CC" /> | ||
| <PackageReference Include="Telerik.Documents.SpreadsheetStreaming" Version="ZZ.YY.XX" /> | ||
| <PackageReference Include="Telerik.Documents.Spreadsheet" Version="ZZ.YY.XX" /> | ||
| <PackageReference Include="Telerik.Documents.Spreadsheet.FormatProviders.OpenXml" Version="ZZ.YY.XX" /> | ||
| </ItemGroup> | ||
| ```` | ||
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| ## See Also | ||
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| * [Telerik Document Processing Libraries Overview]({%slug dpl-in-blazor%}) |