Display Document Libraries

      SPSite siteCollection = new SPSite("Http://Mohan");
        SPWebCollection sites = siteCollection.AllWebs;
        foreach (SPWeb site in sites)
        {
            //SPListCollection:- object that represents the collection of lists in a site
            SPListCollection lists = site.Lists;
            foreach (SPList list in lists)
            {
                if (list.BaseType == SPBaseType.DocumentLibrary)
                {
                    //SPDocumentLibrary:- Represents a document library in Windows SharePoint Services. displays the name of the site and list, as well as the file name, for each item in every document library.
                    SPDocumentLibrary docLibrary = (SPDocumentLibrary)list;
                    if (!docLibrary.IsCatalog && list.BaseTemplate != SPListTemplateType.XMLForm)
                    {
                        //SPListItemCollection :- Represents a collection of SPListItem objects. To return the collection of items for a list or document library
                        SPListItemCollection docLibItems = docLibrary.Items;
                        foreach (SPListItem docLibItem in docLibItems)
                        {
                            Label1.Text += docLibItem.Name + "<br>";
                            //Label1.Text +=  " Docuement title -- " + docLibItem["Title"] + "<BR>";
                        }
                    }
                }
            }
        }