how to use php website database into my c# windows

If they already have a service that returns json data then you can easily consume that in you windows app. There's a bunch of examples from the web that you can refer about comsuming json data to your windows app. for example:

https://channel9.msdn.com/Series/Windows-Store-apps-for-Absolute-Beginners-with-C-/Part-11-Working-with-JSON-Data

https://blogs.msdn.microsoft.com/africaapps/2013/02/25/parsing-json-in-windows-phone-apps/

thanks for you reply.

actually i have joined with a new company that company has one php website(e.g:-https://www.firstchoicefood.in/) with mysql database, by using json this web has its android and ios app. now they gave me a job to make a windows store app.

i need help to do this job. i haven't made it before,i want to know how can use existing databse...please suggest me somtething easy steps.Thanks all in advance

which database are you using? mySql? if so then see if this article helps:

https://blogs.oracle.com/MySqlOnWindows/entry/how_to_using_connector_net