C#

class a : b
{
   class c
   {
   }

}

#region Set Text Code

 public delegate void SetText(Control ctrl, string str);
 public delegate void SetLabel(Control lblctrl, string filename);
 private delegate void updateBar();

 private void setText(Control ctrl, string str)
 {
     if (this.WindowState == FormWindowState.Minimized)
         return;
     if (ctrl.InvokeRequired)
         ctrl.BeginInvoke(new SetText(setText), new object[] { ctrl, str });
     else
         ctrl.Text = str;
 }

 private void setFilename(Control lblctrl, string filename)
 {
     if (this.WindowState == FormWindowState.Minimized)
         return;
     if (lblctrl.InvokeRequired)
         lblctrl.BeginInvoke(new SetLabel(setFilename), new object[] { lblctrl, filename });
     else
         lblctrl.Text = filename;
 }

 private void finalizeProcess()
 {
     //progressBar1.Style = ProgressBarStyle.Blocks;
     //progressBar1.Value = 0;
     //progressBar1.Dispose();
     GC.Collect();
     //base.Close();
 }

 #endregion

 #region Open File Dialog Code

 private void button3_Click(object sender, EventArgs e)
 {
     if (openFileDialog1.ShowDialog() != DialogResult.OK)
     {
         return;
     }
     else
     {
         txtboxSelectFile.Text = openFileDialog1.FileName;
     }

 }

 #endregion

 #region Select File Code

 private void btnStart_Click(object sender, EventArgs e)
 {
     setText(this, "Checking Process Selection");
     if (chkboxHolders.CheckState == CheckState.Unchecked && chkboxCert.CheckState == CheckState.Unchecked &&
         chkboxPiadd.CheckState == CheckState.Unchecked && chkboxDivRecords.CheckState == CheckState.Unchecked)
     {
         MessageBox.Show("Please make a valid processing selection", "Invalid Process Selection",
             MessageBoxButtons.OK, MessageBoxIcon.Error);
     }
     else
     {
         if (chkboxHolders.Checked)
         {
             setText(this, "Holder File Processing Selected");
             processHolders();
         }
         if (chkboxCert.Checked)
         {
             setText(this, "Certificate File Processing Selected");
             processCerts();
         }

         if (chkboxPiadd.Checked)
         {
             setText(this, "Payment Instruction File Processing Selected");
             processDiv();
         }

         if (chkboxDivRecords.Checked)
         {
             setText(this, "Create Dividend Files");
             processDividends();
         }

     }
 }

 #endregion

 #region All Threading Code

 private void processHolders()
 {
     if (saveFileDialog1.ShowDialog() == DialogResult.OK)
     {
         ThreadStart starthld = new ThreadStart(convertHolders);
         Thread threadhld = new Thread(starthld);
         threadhld.Start();
     }
 }

 private void processCerts()
 {
     if (saveFileDialog1.ShowDialog() == DialogResult.OK)
     {
         ThreadStart startcert = new ThreadStart(convertCert);
         Thread threadcert = new Thread(startcert);
         threadcert.Start();
     }
 }

 private void processDiv()
 {
     if (saveFileDialog1.ShowDialog() == DialogResult.OK)
     {
         ThreadStart startdiv = new ThreadStart(convertDiv);
         Thread threaddiv = new Thread(startdiv);
         threaddiv.Start();
     }
 }

 private void processDividends()
 {
     if (folderBrowserDialog1.ShowDialog() == DialogResult.OK)
     {
         ThreadStart startdivs = new ThreadStart(convertDividendPayments);
         Thread threaddivs = new Thread(startdivs);
         threaddivs.Start();
     }
 }

 #endregion

 #region All Processing Code

 private void convertHolders()
 {
     //Declare Input File
     string infile;
     //Point to Input File
     infile = txtboxSelectFile.Text;
     //Declare output File
     string outfile;
     //Point to Output File
     outfile = saveFileDialog1.FileName;
     //Declare Lines of data
     string holdline;
     //Declare File Reader
     StreamReader sr = new StreamReader(infile);
     //Declare File Writer
     StreamWriter sw = new StreamWriter(outfile);

     //Sets the Control text
     setText(this, "Start Holder File Conversion");
     //Declare counter for number of holders on File
     int holdercount = 0;
     //Declare running Share Total
     Int64 currentbal = 0;
     //Declare running Old Balance Total
     Int64 oldbal = 0;
     //Declare Final Share Total
     long ShareTotal = 0;
     //Declare Final Old balance Total
     long ShareOld = 0;
     //Start Reading the Data
     while (!sr.EndOfStream)
     {
         holdline = sr.ReadLine();
         //Declare all Field variables
         string HID = holdline.Substring(0, 10);
         string Title = holdline.Substring(10, 45).Trim();
         string Surname = holdline.Substring(55, 100).Trim();
         string FirstName = holdline.Substring(155, 100).Trim();
         string OtherNames = holdline.Substring(255, 100).TrimEnd();
         string Gender = holdline.Substring(355, 1);
         string Addr1 = holdline.Substring(356, 35).TrimEnd();
         string Addr2 = holdline.Substring(396, 35).TrimEnd();
         string Addr3 = holdline.Substring(436, 35).TrimEnd();
         string Addr4 = holdline.Substring(476, 35).TrimEnd();
         string Addr5 = holdline.Substring(516, 35).TrimEnd();
         string PostCode = holdline.Substring(556, 10).TrimEnd();
         string Nationality = holdline.Substring(566, 25).TrimEnd();
         string BranchCode = holdline.Substring(591, 6);
         string AccountNumber = holdline.Substring(597, 16);
         string AccountType = holdline.Substring(613, 2);
         string NationalId = holdline.Substring(615, 16).TrimEnd();
         string TotalShares = holdline.Substring(631, 18);
         string FullName = Title + " " + FirstName + " " + Surname;
         int namelen = FullName.Length;
         int namerem = namelen - 35;
         currentbal = Convert.ToInt64(TotalShares);
         string OldBalance = holdline.Substring(649, 18);
         oldbal = Convert.ToInt64(OldBalance);
         ///Check for any holders that have a zero balance as these will
         ///not go onto the System unless dividend Data is Migrated.
             setText(this, "Processing HolderID: " + HID);
             if(namelen > 35)
             {
                 sw.Write(" ".PadRight(5, ' ') + "NAADD" + " ".PadRight(7, ' ') + "C" + HID +
                     FullName.Substring(0, 35).PadRight(35, ' ') + FullName.Substring(35, namerem).PadRight(35, ' ') +
                     Addr1.PadRight(35, ' ') + Addr2.PadRight(35, ' ') + Addr3.PadRight(35, ' ') + Addr4.PadRight(35, ' ') +
                     Addr5.PadRight(35, ' ') + " ".PadRight(35, ' ') + PostCode.PadRight(5, ' ') + "ZAF" +
                     "IND" + " ".PadRight(57, ' ') + HID.PadRight(12, ' ') + " ".PadRight(13, ' '));
             }
             else if (namelen <= 35)
             {
                 sw.Write(" ".PadRight(5, ' ') + "NAADD" + " ".PadRight(7, ' ') + "C" + HID + FullName.Trim().PadRight(35, ' ') +
                     Addr1.PadRight(35, ' ') + Addr2.PadRight(35, ' ') + Addr3.PadRight(35, ' ') + Addr4.PadRight(35, ' ') +
                     Addr5.PadRight(35, ' ') + " ".PadRight(70, ' ') + PostCode.PadRight(5, ' ') + "ZAF" +
                     "IND" + " ".PadRight(57, ' ') + HID.PadRight(12, ' ') + " ".PadRight(13, ' '));
             }
             if (NationalId == "" || NationalId.Length < 13)
             {
                 sw.Write(" ".PadRight(1142, ' ') + " ".PadRight(1456, ' ') + Environment.NewLine);
             }
             else
             {
                 sw.Write("Z" + NationalId.PadRight(16, ' ') + " ".PadRight(1125, ' ') + " ".PadRight(1456, ' ') + Environment.NewLine);
             }
             ShareTotal = ShareTotal + currentbal;
             ShareOld = ShareOld + oldbal;
             holdercount++;

     }
     sr.Close();
     sw.Close();
     setFilename(lblShareTotals, ShareTotal.ToString());
     setFilename(lblHolderTotal, holdercount.ToString());
     setFilename(lblOldBalanceTotals, ShareOld.ToString());
     this.progressBar1.Invoke(new updateBar(this.finalizeProcess));
     MessageBox.Show("Completed Processing Holder File", "Holder File Completed",
         MessageBoxButtons.OK, MessageBoxIcon.Information);
     setText(this, "Holder File Processing Completed");
 }

 private void convertCert()
 {
     string infile;
     infile = txtboxSelectFile.Text;
     string outfile;
     outfile = saveFileDialog1.FileName;
     string holdline;
     Int64 currentbal = 0;
     long ShareTotal = 0;
     int totaltrans = 0;
     StreamReader sr = new StreamReader(infile);
     StreamWriter sw = new StreamWriter(outfile);
     setText(this, "Start Certificate File Conversion");
     while (!sr.EndOfStream)
     {
         holdline = sr.ReadLine();
         string HID = holdline.Substring(0, 10);
         string day = holdline.Substring(10, 2);
         string month = holdline.Substring(13, 2);
         string year = holdline.Substring(16, 4);
         string cert = holdline.Substring(20, 10).Trim();
         string transaction = holdline.Substring(30, 55).TrimEnd();
         string shares = holdline.Substring(85, 18);
         setText(this, "Processing HolderID: " + HID);
         if (chkoxCreateCerts.Checked)
         {
             if (shares != "000000000000000000")
             {
                 sw.WriteLine(" ".PadRight(5, ' ') + "CAPIN" + " ".PadRight(8, ' ') +
                     day + month + year.Substring(2, 2) + "+" + shares.Substring(4, 14) + "000000" +
                     "ORD" + "ZAF" + " ".PadRight(5, ' ') + "C" + HID + " ".PadRight(10, ' ') +
                     cert.PadLeft(12, '0') + " ".PadRight(2911, ' '));
                 currentbal = Convert.ToInt64(shares);
                 ShareTotal = ShareTotal + currentbal;
             }
         }
         else
         {
             if (shares != "000000000000000000")
             {
                 sw.WriteLine(" ".PadRight(5, ' ') + "ADJIN" + " ".PadRight(8, ' ') +
                     day + month + year.Substring(2, 2) + "+" + shares.Substring(4, 14) + "000000" +
                     "ORD" + "ZAF" + " ".PadRight(5, ' ') + "C" + HID + " ".PadRight(10, ' ') +
                     cert.PadLeft(12, '0') + " ".PadRight(2911, ' '));
                 currentbal = Convert.ToInt64(shares);
                 ShareTotal = ShareTotal + currentbal;
             }
         }
         totaltrans++;
     }
     setFilename(lblCertificateTotals, totaltrans.ToString());
     setFilename(lblCertificateBalance, ShareTotal.ToString());
     sr.Close();
     sw.Close();
     this.progressBar1.Invoke(new updateBar(this.finalizeProcess));
     MessageBox.Show("Completed Processing Certificate File", "Certificate File Completed",
         MessageBoxButtons.OK, MessageBoxIcon.Information);
     setText(this, "Certificate File Processing Completed");
 }

 private void convertDiv()
 {
     //Declare Input File
     string infile;
     //Point to Input File
     infile = txtboxSelectFile.Text;
     //Declare output File
     string outfile;
     //Point to Output File
     outfile = saveFileDialog1.FileName;
     //Declare Lines of data
     string holdline;
     int totalCount = 0;
     //Declare File Reader
     StreamReader sr = new StreamReader(infile);
     StreamWriter swb = new StreamWriter(outfile);
     setText(this, "Start Payment Instruction Conversion");
     while (!sr.EndOfStream)
     {
         holdline = sr.ReadLine();
         string HID = holdline.Substring(0, 10);
         string BranchCode = holdline.Substring(591, 6);
         string AccountNumber = holdline.Substring(597, 16);
         string shares = holdline.Substring(85, 18);
         string newBranch = BranchCode.Substring(0, 3) + "-" + BranchCode.Substring(3, 3);
         setText(this, "Processing HolderID: " + HID);
         if (BranchCode != "      ")
         {
             if (shares != "000000000000000000")
             {
                 swb.WriteLine(" ".PadRight(5, ' ') + "PIADD" + " ".PadRight(7, ' ') + "C" + HID + "10" +
                     "D" + "   " + newBranch.PadRight(10, ' ') + AccountNumber.PadRight(16, ' ') + " ".PadRight(2940, ' '));
                 totalCount++;
             }
         }
     }
     sr.Close();
     swb.Close();
     setFilename(lblPaymentInstrucTotals, totalCount.ToString());
     this.progressBar1.Invoke(new updateBar(this.finalizeProcess));
     MessageBox.Show("Completed PIADD Conversion", "PIADD Conversion Message",
         MessageBoxButtons.OK, MessageBoxIcon.Information);
     setText(this, "Payment Instruction File Processing Completed");
 }


 private void convertDividendPayments()
 {
     string filePath;
     string inFile;
     string holdLine;
     inFile = txtboxSelectFile.Text;
     filePath = folderBrowserDialog1.SelectedPath;
     long TotalGross = 0;
     long TotalTax = 0;
     long TotalNet = 0;
     Int64 gross = 0;
     Int64 tax = 0;
     Int64 net = 0;
     StreamReader sr = new StreamReader(inFile);
     StreamWriter swp = new StreamWriter(Path.Combine(filePath, "er_au_xxxx_seqmpd.temp"));
     setText(this, "Starting Payment File Conversions");
     while (!sr.EndOfStream)
     {
         holdLine = sr.ReadLine();
         string DividendNumber = holdLine.Substring(0, 9).TrimEnd();
         string CADescription = holdLine.Substring(9, 55);
         string HolderRef = holdLine.Substring(64, 10);
         string PaymentType = holdLine.Substring(74, 1);
         string PaymentRef = holdLine.Substring(75, 10);
         string LdrBal = holdLine.Substring(85, 18);
         string GrossAmount = holdLine.Substring(103, 18);
         string TaxAmount = holdLine.Substring(121, 18);
         string NetAmount = holdLine.Substring(139, 18);
         string PaymentStatus = holdLine.Substring(157, 1);
         string PaymentDate = holdLine.Substring(158, 10);
         gross = Convert.ToInt64(GrossAmount);
         tax = Convert.ToInt64(TaxAmount);
         net = Convert.ToInt64(NetAmount);
         setText(this, "Processing HolderID: " + HolderRef);
         swp.Write("C" + HolderRef + "DIV" + DividendNumber + PaymentRef.Substring(2, 8).PadLeft(8, '0'));

         if (PaymentType == "E")
         {
             swp.Write("D" + PaymentDate.Substring(0, 2) + PaymentDate.Substring(3, 2) + PaymentDate.Substring(6, 4));

         }
         else
         {
             swp.Write(PaymentType + " ".PadRight(8, ' '));
         }
         swp.Write(GrossAmount.Substring(7, 11) + "00" + TaxAmount.Substring(7, 11) + "00" + NetAmount.Substring(7, 11) + "00" + "S");
         if (PaymentStatus == "P")
         {
             swp.Write("2");
         }
         if (PaymentStatus == "C")
         {
             swp.Write("3");
         }
         if (PaymentStatus == "U")
         {
             swp.Write("1");
         }
         if (PaymentStatus == "R")
         {
             swp.Write("E");
         }
         swp.Write("R" + " ".PadRight(24, ' ') + Environment.NewLine);
         TotalGross = TotalGross + gross;
         TotalTax = TotalTax + tax;
         TotalNet = TotalNet + net;
     }

     sr.Close();
     swp.Close();
     setFilename(lblGrossTotals, TotalGross.ToString());
     setFilename(lblTaxTotals, TotalTax.ToString());
     setFilename(lblNetTotals, TotalNet.ToString());
     this.progressBar1.Invoke(new updateBar(this.finalizeProcess));
     MessageBox.Show("Completed Dividend Payment Processing", "Dividend Processing",
         MessageBoxButtons.OK, MessageBoxIcon.Information);
     setText(this, "Dividend File Processing Completed");
 }

 #endregion

private void setFilename(Control lblctrl, string filename)
{
    Console.WriteLine("setFileName Entered: " + lblCtrl.Name + " : " + filename);
    if (this.WindowState == FormWindowState.Minimized)
        return;
    Console.WriteLine("setFileName PreInvokeCheck: " + lblCtrl.Name + " : " + filename);
    if (lblctrl.InvokeRequired)
        {
        Console.WriteLine("setFileName BeginInvoke: " + lblCtrl.Name + " : " + filename);
        lblctrl.BeginInvoke(new SetLabel(setFilename), new object[] { lblctrl, filename });
        }
    else
        {
        Console.WriteLine("setFileName Direct: " + lblCtrl.Name + " : " + filename);
        lblctrl.Text = filename;
        }
}