Since R2 2020 our Telerik UI for WinForms and WPF suites have provided a .NET Core Project Converter via our Visual Studio Extensions. This tool can convert client projects that use .NET Framework 4.8 (or lower) into .NET Core projects to ease the migration.
The R2 2020 release of Telerik UI for WinForms came with a brand new validation management tool—the Telerik Validation Provider. Now you can define multiple validation rules and associate them with editors without having to write a single line of code!