title: fill a textbox in a website using C#
body: <p>I want to fill a textbox in a website and click the submit button using C#</p>
  
  <p>How can I do it ?</p>
  
  <p>Html textbox code:</p>
  
  <pre><code>&lt;input id="url" class="span8" type="text" placeholder="http://" name="url"&gt;&lt;/input&gt;
  </code></pre>
  
  <p>Html button code:</p>
  
  <pre><code>&lt;button id="preview" class="btn btn-large btn-primary" name="preview" type="submit" value="1"&gt;&lt;i class="icon-eye-open icon-white"&gt;&lt;/i&gt; Upload&lt;/button&gt;
  </code></pre>