title: How to add one parameter to current url in c#
body: <p>I have 2 links </p>
  
  <pre><code> &lt;li class="active"&gt;
    &lt;a href="&lt;%#CurrentSearchUrl%&gt;"&gt;&lt;span&gt;Current search Page
   &lt;/span&gt;&lt;/a&gt; 
  
    &lt;li&gt;&lt;a href="&lt;%#CurrentSearchUrlParam%&gt;"&gt;&lt;span&gt;Add param &lt;/span&gt;
        &lt;/a&gt; 
  </code></pre>
  
  <p>in the Page_Load</p>
  
  <pre><code>    CurrentSearchUrl = Request.Url.AbsoluteUri;
      CurrentSearchUrlParam = Request.Url+"&amp;discount=1";
  </code></pre>
  
  <p>param is added but url is not correct
  my current url is </p>
  
  <pre><code>http://localhost:1067/search/default.aspx?q=test
  </code></pre>
  
  <p>I want to add one parameter, the desired result should be</p>
  
  <pre><code>http://localhost:1067/search/default.aspx?q=test&amp;discount=1
  </code></pre>
  
  <p>Thanks in advance</p>