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Could not load file or assembly 'System.Resources.NetStandard' in R3 2023


Product Progress® Telerik® Reporting
Product Version R3 2023 (


I receive the error message Could not load file or assembly 'System.Resources.NetStandard' in R3 2023 (

The problem occurs since with R3 2023 ( we started using a ResXResourceReader implementation for reading the embedded assembly resources. This class is not supported in .NET Standard and is not a part of .NET runtime, so we used a NuGet package to obtain this functionality. The name of the package is ResXResourceReader.NetStandard, it uses an MIT license and has a strong-name variant.


Telerik.Reporting.Processing.CancelProcessingException: 'An error occurred while evaluating the report parameters. Report source cannot be processed. Check the InnerException for more information.'

Inner Exception:

FileNotFoundException: Could not load file or assembly 'System.Resources.NetStandard, Version=, Culture=neutral, PublicKeyToken=null'. The system cannot find the file specified.


NuGet packages

This package is added as a dependency in Telerik.Reporting .nuspec file, so if you reference Telerik Reporting as a nuget package, you'll also automatically get the System.Resources.NetStandard.dll assembly.

Direct References

You will get the above runtime exception if in your project Telerik Reporting is referenced as an assembly, i.e.:

    <Reference Include="Telerik.Reporting">

The solution is to add a NuGet package reference to ResXResourceReader.NetStandard in your project, or download its contents, extract it, and reference the System.Resources.NetStandard.dll directly.

See Also

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