title: how to create an ip range fast as fast as possible?
body: <p>how to get the fastest result
  i write the code below.</p>
  
  <pre><code>for (int i = 0; i &lt; 256; i++)
               for (int j = 0; j &lt; 256); j++)
                 for (int k = 0; k &lt; 256; k++)
                       for (int p = 0; p &lt; 256; p++)
                       {
                           writer.WriteLine(string.Format("{0}.{1}.{2}.{3}", i, j, k, p));
                       }
  </code></pre>
  
  <p>but my users told me that it is dammed slow. i dont have any idea how to boost  the progress. share the problem, maybe
   someone knows that. thanks.</p>