FileNotFoundException was unhandled by user code

I am trying to read documents from a SharePoint Foundation web site from a console application (I have the same error from an ASP .NET web application).

I get an "FileNotFoundException was unhandled by user code" error message. The detail of the message is:
************************************************************************
The Web application at http://win2008 could not be found. Verify that you have typed the URL correctly. If the URL should be serving existing content, the system administrator may need to add a new request URL mapping to the intended application.
************************************************************************

Here is my code:
**************************************************************************************
            using (SPWeb oWebsite = new SPSite("http://win2008").OpenWeb())
            {
                string folderUrl = "Shared Documents";
                SPFolder oFolder = oWebsite.GetFolder(folderUrl);
                SPFileCollection collFile = oFolder.Files;

                foreach (SPFile oFile in collFile)
                {
                    Console.WriteLine(oFile.Name);
                 }
            }
***********************************************************************************

Thanks!