Hi Deepak,
Thanks for using Syncfusion product.
We have analyzed your query. To enable the Intellisense, kindly check whether Auto list members under Tools > Options > Text Editor > C# > General checkbox has checked.
Screenshot:
Intellisense screenshot:
Intellisense is working fine in our side. For your reference we have attached the sample. Kindly find the sample from below location.
If this is not working, kindly revert us with your sample.
Thanks,
Dharani.