C#

mshtml.IHTMLDocument3 domDoc = this.webBrowser.Document.DomDocument as mshtml.IHTMLDocument3;
mshtml.IHTMLElement element = domDoc.getElementById("tbody_rank_by_level");
String innerHtml = element.innerHTML;
String innerText = element.innerText;

string strA = "This is string A";  // Length = 16
string strB = "                 This is string B"; // Length = 33
// Merge strA and strB, character ' ' is transparent.
// Desired result = "This is string A This is string B"; // Length = 33

string strA = "This is string A";  // Length = 16
string strB = "      This is string B"; // Length = 22
// Merge strA and strB, character ' ' is transparent.
// Desired result = "This iThisrisgstring B"; // Length = 22

string strA = "This is string A and it is longer then string B";  // Length = 47
string strB = "      This is string B"; // Length = 22
// Merge strA and strB, character ' ' is transparent.
// Desired result = "This iThisrisgstring Bt is longer then string B"; // Length = 47

There are 1 recoverable files and 0 other files.
The block size used was 384000 bytes.
There are a total of 282 data blocks.
The total size of the data files is 108185219 bytes

ProcessStartInfo info = new ProcessStartInfo();
info.FileName = "par2";
info.Arguments = "r \"existing par2 file\"";
info.RedirectStandardOutput = true;
info.UseShellExecute = false;
info.CreateNoWindow = true;
Process proc = new Process();
proc.StartInfo = info;
proc.Start();
Char[] buffer;
while (!proc.HasExited)
{

   string tekst = proc.StandardOutput.ReadLine();
   result = tekst;
}
proc.WaitForExit();

DataTable dt1, DataTable dt2;

colA  colB  colC
----------------
a1    b1    c1
a2    b2    c2
a3    b3    c3 

colD  colE  colF
----------------
d1    e1    f1
d2    e2    f2
d3    e3    f3 

Required DataTable

colA  colB  colC  colD  colE  colF
--------------------------------
a1    b1    c1    d1    e1    f1
a2    b2    c2    d2    e2    f2
a3    b3    c3    d3    e3    f3

private void Form1_Load(object sender, EventArgs e)
        {
           
            try
            {
                tcp_client = new TcpClient("192.168.1.222", 4444);
            }
            catch
            {
                label2.Text = "not connected";
                return;
            }

            ag_akimi = tcp_client.GetStream();
            akim_okuyucu = new StreamReader(ag_akimi);
            akim_yazici = new StreamWriter(ag_akimi);
          
        }


        private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                akim_yazici.WriteLine("sample ");
                akim_yazici.Flush();
                textBox1.Text += akim_okuyucu.ReadLine();
            }
            catch
            {
                MessageBox.Show("error!");
            }

        }

        private void form_kapatiliyor(object sender, FormClosingEventArgs e)
        {
            try
            {
                akim_okuyucu.Close();
                akim_yazici.Close();
                ag_akimi.Close();
                istemcisoketi.Close();
            }
            catch
            {
                MessageBox.Show("Not properly closed");
            }
        }
    }

public void Form1_Load(object sender, EventArgs e)
       {
           CheckForIllegalCrossThreadCalls = false;
           thread_dinleyici = new Thread(new ThreadStart(dinle));
           thread_dinleyici.Start();
       }


       public void dinle()
       {
           tcp_listener = new TcpListener(IPAddress.Any, 4444);
           tcp_listener.Start();
           istemcisoketi = tcp_listener.AcceptSocket();
           ag_akimi = new NetworkStream(istemcisoketi);

           if (istemcisoketi.Connected)
           {
               while (true)
               {
                   akim_yazici = new StreamWriter(ag_akimi);
                   akim_okuyucu = new StreamReader(ag_akimi);
                   try
                   {
                       richTextBox1.Text += akim_okuyucu.ReadLine();
                       akim_yazici.WriteLine("message");
                       akim_yazici.Flush();
                   }
                   catch
                   {
                       label1.Text = "closing";
                       istemcisoketi.Close();
                       ag_akimi.Close();
                       akim_yazici.Close();
                       akim_okuyucu.Close();
                       istemcisoketi.Close();
                       return;
                   }
               }
           }
           else
           {
           }

       }