SharePoint Delete attachment

private void DeleteAttachment(int NodeID)
{
try
{
SPList myList = SPContext.Current.Web.Lists["Item List"];
SPListItem delItem = myList.GetItemById(NodeID);
SPAttachmentCollection atCol = delItem.Attachments;
if (delItem["Attached FileName"] != null)
{
string strFileName = delItem["Attached FileName"].ToString();
delItem["Attached FileName"] = string.Empty;
atCol.Delete(strFileName);
delItem.Update();
}
}
catch (Exception eDel)
{
string errDel = eDel.Message;
}
}