This Article will show you to Import your Googla Mail Contacts in the Dataset of your ASP.NET Application. To do so you need to install Google Data API SDK setup on your system. First we will add some specific DLL files in our Project Folder to do so. The DLLs are Google.Gdata.Contacts, Google.Gdata.Clients, Google.Gdata.Extensions and Google.Contacts. Later in this article I wll tell you that how to use these DLLs to Import Google Mail Contacts.