How to get current site template ID and Name using CSOM SharePoint 2013

Hi,

I am trying to fetch current using site Template ID and Name sung SharePoint 2013 CSOM.

ctx.Web.Webtemplate will some name.But I am not able to get exact ID of the base template ID

Please suggest me how I can get ?

Say for exampple STS#01 like this.

Thanks

Siddartha