In order to create reports in report designers the product must be installed on the machine - installation steps
. Telerik Reporting NuGet packages are provided only for adding the Reporting engine and Reporting REST service in ASP.NET Core projects. The packages do not include design-time support.
After installing the product, I would also recommend visiting the following sections from our online documentation that can help you to get started with reports:
Working demos can be found in product installation folder:
C:\Program Files (x86)\Progress\Telerik Reporting R1 2018\Report Designer\Examples
C:\Program Files (x86)\Progress\Telerik Reporting R1 2018\Examples
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