Thank you for the question.
Please keep the following in mind when creating and binding RadComboBox in run-time:
- Add your instance of RadComboBox to its parent form before data-binding occurs.
its ValueMember and DisplayMember properties before setting its
DataSource. This will significantly increase the performance.
I hope this is helpful. If you have other questions do not hesitate to contact me again.
All the best,
the Telerik team