Code snippet to copy documents from one document library to another

    1:  using (SPSite site = new SPSite("http://ms10:200/sites/200"))
    2:              {
    3:                  using (SPWeb web = site.OpenWeb())
    4:                  {
    5:                      SPList lib1 = (SPDocumentLibrary)web.Lists["Documents"];
    6:                      SPList lib2 = (SPDocumentLibrary)web.Lists["Site Collection Documents"];
    7:                      byte[] fileBytes = null;
    8:                      string destUrl = null;
    9:                      SPFile destFile = null;
   10:                      foreach (SPListItem item1 in lib1.Items)
   11:                      {
   12:                          fileBytes = item1.File.OpenBinary();
   13:                          destUrl = lib2.RootFolder.Url + "/" + item1.File.Name;
   14:                          destFile = lib2.RootFolder.Files.Add(destUrl, fileBytes, true /*overwrite*/);
   15:   
   16:                          fileBytes = null;
   17:                          destUrl = null;
   18:                          destFile = null;
   19:                      }
   20:   
   21:                      lib1 = null;
   22:                      lib2 = null;
   23:                  }
   24:              }
   25:              MessageBox.Show("Done!");

:: Please note that I would have just uploaded my initial code and you might want to consider proper optimization of the code and disposal of objects properly. I might not have updated the latest code here.