i create dictionary in c# desktop application how can i connect my application to website for getting means of words thanks. .

Not very clear what you are looking for... you might give us some more information.

Are you looking to pull a word list from a web location and bring it into your application? If so, it would depend on how the endpoint is providing the information. The approaches are different depending on if they are on a web page (you have to request the page then scrape the results), a downloadable text file (you have to download the file then parse it), an XML file (again, parsing), a web service (does it return the list in SOAP, JSON, etc), or some other method? (It could be something exotic like Web Sockets) Each approach has strength and weaknesses and very different implementations.