How do you instantiate a SPWeb Object from a console app?

I am trying to write a console app that simply lists the number of lists at the sharepoint root.

I tried doing it by using the following code, but the object SPContext.Current is null. Any ideas of how to get the web object?

 SPWeb web = SPContext.Current.Site.OpenWeb("http://localhost") ;

From stackoverflow

• SPSite spSite = new SPSite("http://myurl");
  SPWeb spMySite = spSite.Allwebs["mysite"];
  SPWeb spRootsite = spsite.RootWeb;
  

  The console app will only run on the server as usual. Also, the url used http://myurl can be a url to a page and an SPSite object will be created. E.g. http://myurl/mysite/pages/default.aspx will get a valid SPSite object.

  Slace : Just make sure you take into account what Nico stated, SPSite and SPWeb both implement IDisposable and you really need to dispose of then when you're done. http://blogs.msdn.com/rogerla/archive/2008/02/12/sharepoint-2007-and-wss-3-0-dispose-patterns-by-example.aspx for more on that

  Nat : Yeah, nothing like leaving 2MB objects just lying around.

  Peter Walke : Thanks again for this response. I came back to this again today for reference.

• Just adding a little thing to Nat's post:
  Even if it's not a important as in a SharePoint WebApp, it's still recommenced to dispose all SPWeb and SPSite objets.
  So do keep good habits:

  using (SPSite site = new SPSite(weburl))
  {
      using (SPWeb web = site.OpenWeb())
      {
          // bla bla
      }
  }
  

  Note: you can directly pass the weburl to SPSite constructor, so OpenWeb will open the given web.

• There are a couple of other ways you can use SPSite.OpenWeb() as well...

  If you keep track of the SPWeb object's GUID:

  site.OpenWeb(webUid);
  

  Using a web's server or site relative URL or title, see MSDN SPSite.OpenWeb(string) for more details:

  site.OpenWeb(relativeUrl);
  site.OpenWeb(title);
  

  Using the precise relative URL and avoiding any clever stuff that SPSite.OpenWeb(string) uses:

  site.OpenWeb(relativeUrl, true);