Magento API integrate C# website

Can someone give me sample of projects or codes that use Magento web api to integrate in ASP.Net project. I don't know what to put in the web config for the connection similar to this one: <add key="VOLUSION_BASE_API" value="https://{DomainName}/net/WebService.aspx" /> I have already the Username, API Key and Consumer Key and Consumer Secret. But I really don't know how to start. How will I connect to the API and get the orders from magento website.

Please help me.