Assigned Groups of Document Library through CSOM

Hi,

I am able to get all the groups of site collection through CSOM.

But ultimately i should be able to get the groups that have been assigned to a document library.

For example there is document library called doclib1,under the document library permissions i have added only group1 and group3.

Now I have to display these group1 and group3 alone in the listbox through CSOM.

Please share your thoughts/ideas on the same.

Regards,

Sudheer

Thanks & Regards, Sudheer