Zoho CRM Integration in .Net what will eastimate time?

Zoho CRM Integration in .Net what will eastimate time?

Hi,
 
Anybody have a experience in ZohoCRM Integration in .net? One of our existing client ask us to integrate Zoho CRM in his ASP.Net application. I just seen zoho today itself. I am new to CRM and Zoho. Will anybody will suggest time eastimation for this?
 
Thanks
Suren