public List<string> MapMyFiles()
{
    List<FileInfo> batchaddresses = new List<FileInfo>();
    foreach (object o in lstViewAddresses.Items)
    {
        try
        {
            string[] files = Directory.GetFiles(o.ToString(), "*-E.esy");
            files.ToList().ForEach(f => batchaddresses.Add(new FileInfo(f)));
        }
        catch
        {
            if(MessageBox.Show(o.ToString() + " does not exist. Process anyway?",
                       "Continue?", MessageBoxButtons.YesNo)
                == DialogResult.Yes) { }
            else
            {
                Application.Exit();
            }
        }
    }

    return batchaddresses.OrderBy(f => f.CreationTime)
             .Select(f => f.FullName).ToList();
}

i would like to add to the array not only

.ESY

but also

"p-.csv"

how do i do this?