title: How to keep logs in C#?
body: <p>This is a WinForm written in C#.
  Lets say I'm generating a random named text file in my selected directory. When the button is clicked teh first time, i write the data contained in the textboxes into that text file. If the user wants to do the same thing with different data in the textboxes then the click on the button should write the new data into the text file without losing the old data. It's like keeping logs, is this possible? </p>
  
  <p>My code is like:</p>
  
  <pre><code>private readonly Random setere = new Random(); 
      private const string chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"; 
      private string RandomString() 
      { 
          char[] buffer = new char[5]; 
          for (int i = 0; i &lt; 5; i++) 
          { 
              buffer[i] = chars[setere.Next(chars.Length)]; 
          } 
          return new string(buffer); 
      }
  
  
  
  
      private void button1_Click(object sender, EventArgs e)
      {
  
  
          DialogResult dia = MessageBox.Show("Wanna continue?", "Question", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
  
  
          if (dia == DialogResult.Yes)
          {
              StreamWriter wFile = new StreamWriter("C:\\Users\\Ece\\Documents\\Testings\\" + RandomString() + ".txt");
              wFile.WriteLine("Name Surname:" + text1.Text + text2.Text);
              wFile.WriteLine("Other:" + text3.Text + text4.Text);
              wFile.WriteLine("Money:" + textBox1.Text + " TL.");
              wFile.WriteLine("*************************************");
              wFile.Close();
  
  
  
          }
          else 
          {
  
              return;
          }
  
  
      }
  </code></pre>