title: how to add querystring from value of textbox? ASP .NET c#
body: <p>I have a login page for a website where members insert their email in a textbox.  My question is how to redirect to another page depending on the value of the textbox, for example</p>
  
  <pre><code>Response.Redirect("homepage.aspx?and here the value of the textbox");
  </code></pre>