telerik · dimodi · Oct 10, 2024 · Oct 10, 2024
@@ -35,4 +35,5 @@ Telerik Document Processing Libraries' [Configuration Wizard](https://docs.teler
 * [Getting Started with Telerik Document Processing Libraries](https://docs.telerik.com/devtools/document-processing/getting-started/getting-started#getting-started-with-telerik-document-processing)
 * [Installing on Your Computer](https://docs.telerik.com/devtools/document-processing/getting-started/installation/installing-on-your-computer)
 * [Trial Version and Commercial License](https://docs.telerik.com/devtools/document-processing/introduction#trial-version-and-commercial-license)
-* [System Requirements](https://docs.telerik.com/devtools/document-processing/getting-started/installation/system-requirements)
+* [System Requirements](https://docs.telerik.com/devtools/document-processing/getting-started/installation/system-requirements)
+* [Version Conflict Detected Error for Telerik.Zip]({%slug dpl-kb-version-conflict-detected-telerik-zip%})
@@ -0,0 +1,124 @@
+---
+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
+---
+
+## Environment
+
+<table>
+    <tbody>
+        <tr>
+            <td>Product</td>
+            <td>UI for Blazor <br /> Telerik Document Processing</td>
+        </tr>
+    </tbody>
+</table>
+
+
+## Description
+
+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.
+
+
+## Error Message
+
+<div class="skip-repl"></div>
+
+```
+Error NU1107: Version conflict detected for Telerik.Zip. Install/reference Telerik.Zip ... directly to project ... to resolve this issue.
+```
+
+or
+
+<div class="skip-repl"></div>
+
+```
+Warning NU1605: Detected package downgrade: Telerik.Zip from ... to .... Reference the package directly from the project to select a different version.
+```
+
+
+## Cause
+
+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`.
+
+Most [Telerik Document Processing]({%slug dpl-in-blazor%}) NuGet packages depend on `Telerik.Documents.Core`, which also depends on `Telerik.Zip`.
+
+In other words, `Telerik.Zip` is a transitive dependency of multiple other Telerik NuGet packages.
+
+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.
+
+[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.
+
+[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.
+
+
+## Solution
+
+There are several ways to fix the NuGet conflict errors:
+
+* [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)
+
+The ultimate goal is all Telerik NuGet packages in the app to use the same version of `Telerik.Zip`.
+
+### Upgrade or Downgrade NuGet Package Versions
+
+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.
+
+### Reference the Telerik.Zip Package Explicitly
+
+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.
+
+>caption Project file
+
+<div class="skip-repl"></div>
+
+````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>
+````
+
+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.
+
+>caption NuGet Warning NU1608
+
+<div class="skip-repl"></div>
+
+```
+NU1608: Detected package version outside of dependency constraint: Telerik.Documents.SpreadsheetStreaming ... requires Telerik.Zip ... but version Telerik.Zip ... was resolved.
+```
+
+### Reference the Telerik.Documents.SpreadsheetStreaming Package Explicitly
+
+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.
+
+>caption Project file
+
+<div class="skip-repl"></div>
+
+````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>
+````
+
+## See Also
+
+* [Telerik Document Processing Libraries Overview]({%slug dpl-in-blazor%})