how to separate dicom files according to seriesinstanceUID (0020,000E)

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C#

DICOM

friends i need some help.. regarding the DICOM images..

i am newbie to dicom and i am in the middle of a a project i.e to create thumbnails of the dicom images separated by their "seriesinstanceUID" (0020,000E) and list them in the different list boxes. i know how to create thumbnails but don't know how to separate them according to seriesinstanceUID.. and one more thing i am using fo-dicom library..

thank you..

private void button2_Click(object sender, EventArgs e)
   {
       var fbd = new FolderBrowserDialog();
       if (fbd.ShowDialog() == System.Windows.Forms.DialogResult.Cancel)
           return;
       var foldername = fbd.SelectedPath;
       foreach (string f in Directory.EnumerateFiles(foldername, "*.*", SearchOption.AllDirectories))
       {
           OpenFile(@"" + f);

           var m = DicomFile.Open(@""+f);
          listBox2.Items.Add( m.Dataset.Get<string>(DicomTag.SeriesInstanceUID));



       }
   }