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public static Image func_read_images_from_database( string string_ConnectionString, string ID_Dokumente, string SearchColumn )
        {
          Image img;
          byte[] imgData = null;

            using (SqlCeConnection con = new SqlCeConnection(string_ConnectionString))
            {
              con.Open();
                using (SqlCeCommand com = new SqlCeCommand("SELECT '" + SearchColumn + "' FROM Dokumente WHERE ID_Dokumente = '" + ID_Dokumente + "'", con)) 
                {
                    try
                    {
                        using (SqlCeDataReader dr = com.ExecuteReader())
                        {
                            while (dr.Read())
                            {
                                imgData = (byte[]) dr[SearchColumn];
                            }
                        }
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show(ex.ToString());
                    }
                    finally
                    {
                        con.Close();
                    }
              }
          }
   
      if (imgData != null) {
          //Es wurde ein Bild geladen
          MemoryStream ms = new MemoryStream(imgData);
          img = Image.FromStream(ms);
          return img;
      }
      return null;
}                    

1:

SELECT 'Aufgabenkontext' FROM Dokumente WHERE ID_Dokumente = 'MeineLiebeID'