tell me the C# code for gadgets with one application

If you're looking for windows 7 / desktop gadgets,
http://msdn.microsoft.com/en-us/library/windows/desktop/bb456468(v=vs.85).aspx

http://msdn.microsoft.com/en-us/library/windows/desktop/dd834142.aspx

http://msdn.microsoft.com/en-us/library/windows/desktop/dd370867(v=vs.85).aspx

Hi Shiva 

I dont konw what type of gadgets ur talking about.

Please have a look to below link.

http://channel9.msdn.com/coding4fun/blog/You-dont-have-to-be-a-Secret-Agent-to-develop-for-the-AGENT-SmartWatch-You-just-have-to-read-this

to make smart watch.

Thanks