Hi Pavani,
Thank you for your interest in Syncfusion products.
Yes. Syncfusion provides support to add multiple controls with the single ComboDropDown through the PopupControl property of ComboDropDown control.
Please refer the sample in the below link which illustrates the above.
http://websamples.syncfusion.com/samples/Tools.Windows/64295/main.htmPlease try running the above sample and let me know if this helps.
Thanks,
Melba