You may add the previously created Visual Studio reports in a .NET Core ClassLibrary project and they should be successfully resolved by the Reporting Engine running under .NET Core environment. The only drawback is the absence of a Visual Studio Report Designer for .NET Core/Standard.
If it is necessary to edit existing reports or create new ones you may use the Report Designer in a ReportLibrary project in .NET Framework, and then move the generated CS files in the .NET Core ClassLibrary.
The declarative report definitions (TRDP/X files) cannot have code behind. We provide other means for modifying the report layout run-time. For example Expressions, Bindings and Conditional Formatting. We strongly recommend using these mechanisms instead of custom code.
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