title: How do I delete the first "X" lines of a text file?
body: <p>For a project that I am doing, one of the things that I must do is delete the first <em>X</em> lines of a plaintext file. I'm saying <em>X</em> because I will need to do this routine multiple times and each time, the lines to delete will be different, but they will always start from the beginning, delete the first <em>X</em> and then output the results to the same file.</p>
  
  <p>I am thinking about doing something like this, which I pieced together from other tutorials and examples that I read:</p>
  
  <pre><code>String line = null;
  
  String tempFile = Path.GetTempFileName();
  String filePath = openFileDialog.FileName;
  
  int line_number = 0;
  int lines_to_delete = 25;
  
  using (StreamReader reader = new StreamReader(originalFile)) {
      using (StreamWriter writer = new StreamWriter(tempFile)) {
          while ((line = reader.ReadLine()) != null) {
              line_number++;
  
              if (line_number &lt;= lines_to_delete)
                  continue;
  
              writer.WriteLine(line);
          }
      }
  }
  
  if (File.Exists(tempFile)) {
      File.Delete(originalFile);
      File.Move(tempFile, originalFile);
  }
  </code></pre>
  
  <p>But I don't know if this would work because of small stuff like line numbers starting at line 0 or whatnot... also, I don't know if it is good code in terms of efficiency and form.</p>
  
  <p>Thanks a bunch.</p>