Hi Erciyes,
We understand that the demo project is quite large and can be challenging to navigate when looking for specific samples.
To assist further, please follow the prerequisites and setup instructions provided in the official winforms-demos/README.md on GitHub:
winforms-demos/README.md at master · syncfusion/winforms-demos
If you need demos for specific controls, please let us know the names of the controls you plan to explore. We will be happy to share those samples separately for your convenience.
Best regards,
Arul Jenith B.