Retrieve Sharepoint List Attachment programatically...

There is two was you can achieve this:

1.
foreach (string fileName in item.Attachments)
  {
    SPFile file = item.ParentList.ParentWeb.GetFile(
      item.Attachments.UrlPrefix + fileName);
  }


2. 

       SPListItem item = itemColl[0];
       SPFolder folder = ReferenceWeb.Folders["Lists"].SubFolders["Shared Assumption                  Translations"].SubFolders["Attachments"].SubFolders[item.ID.ToString()];
                            foreach (SPFile file in folder.Files)
                            {
                                byte[] binFile = file.OpenBinary();
                                memStr.Write(binFile, 0, binFile.Length);
                            }