Enumerate Sites and Site Collections

The AllWebs property of the SPSite class returns all the Web sites within a site collection, including the top-level site and all subsites. The following example enumerates the titles of all the Web sites and lists in the current site collection.

SPSite oSiteCollection = SPContext.Current.Site;
SPWebCollection collWebsite = oSiteCollection.AllWebs;

for (int i = 0; i < collWebsite.Count; i++)
{
    using (SPWeb oWebsite = collWebsite[i])
    {
        SPListCollection collList = oWebsite.Lists;

        for (int j = 0; j < collList.Count; j++)
        {
            Label1.Text += SPEncode.HtmlEncode(collWebsite[i].Title) + "   "
                + SPEncode.HtmlEncode(collList[j].Title) + "<BR>";
        }
    }
}