title: Clear or Remove query string in ASP.Net
body: <p>I have a <code>QueryString</code> named 'flagEdit' and I want to remove it after fetching it's value.
  But when i try to remove it using</p>
  
  <pre><code>Request.QueryString.Clear();
  </code></pre>
  
  <p>or</p>
  
  <pre><code>Request.QueryString.Remove("editFlag");
  </code></pre>
  
  <p>This error occurs - </p>
  
  <blockquote>
    <p>System.NotSupportedException: Collection is read-only.</p>
  </blockquote>
  
  <p>So, I want to know how to remove query string after fetches it's value</p>