streamToPrint = new StreamReader(@"C:printerlogrootlog2.log");
try
{
    printFont = new Font("Arial", 10);
    PrintDocument pd = new PrintDocument();
    pd.PrintPage += new PrintPageEventHandler(pd_PrintPage);
    // Print the document.
    pd.PrinterSettings.PrinterName = "HP LaserJet M1522 series PCL6 Class Driver";
    pd.Print();
    }
    finally
    {
        streamToPrint.Close();
    }
(...)