Honestly I am bit confused. What do you mean by Integrate Google API with C#? Google has provided .NET client library that you can use with .NET to read, write data from different Google services (Picasa API, Search API, Spreadsheet API, Google Analytics API etc.). If you are looking for this, there are tons of articles available on internet. you can find some of the examples (Google Data API with C#) at my sites. Thanks Vikash Kumar Singh || SinghVikash.in