Apologies for the delay.
We researched further and it seems that .NET Standard 2.1 is still in preview and there is no due date when it will be released officially: .NET Standard 2.1
and .NET implementation support
. Also, in this closed issue in their Github repository (Support .Net Framework (4.8?) for netstandard 2.1
) it is made clear that .net framework 4.8 will not support .NET Standard 2.1.
Our Standalone Report Designer build is targeting .NET Framework 4.0 thus only .NET Framework and .NET Standard assemblies (up to the 2.0 version) for the ObjectDataSource are supported. We have no plans to upgrade the framework of the designer.
Our recommendation is to separate the data retrieval logic in a separate project targeting the full .NET Framework or to target .NET Standard 2.0. But have to make sure that all of the types for the classes are supported for both .NET Core and .NET Full Framework. This way the new .NET Standard data retrieval project/assembly can be referenced both from the Standalone Report Designer .NET Framework application and ASP.NET Core project.
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