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title NuGet Warning NU1505
description NU1505 warning code
author nkolev92
ms.author nikolev
ms.date 03/31/2022
ms.topic reference
f1_keywords
NU1505

NuGet Warning NU1505

Scenario 1

Duplicate 'PackageDownload' items found. Remove the duplicate items or use the Update functionality to ensure a consistent restore behavior. The duplicate 'PackageDownload' items are: X [1.0.0], X [2.0.0].

Issue

Sometimes when adding PackageDownload items, you may end up adding an item for a particular package multiple times.

Example:

<ItemGroup>
  <PackageDownload Include="X" Version="[1.0.0]" />
</ItemGroup>
...
<!-- Somewhere else in the project file, or another MSBuild file-->
<ItemGroup>
  <PackageDownload Include="X" Version="[2.0.0]" />
</ItemGroup>

This can cause an inconsistent restore behavior.

Solution

Consult the recommendations in the warning message and do one of the following:

  • Remove the duplicate items
  • Use item Update instead of item Include