title: Web Client Exception: The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel
body: <p>I have a simple app that uses the C# Web Client class to download a websites HTML.  This is a stripped down sample of the code I'm using:</p>
  
  <pre><code>WebClient wc = new WebClient();
  wc.Headers.Add("user-agent",
      "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.0.3705;)");
  htmlCode = wc.DownloadString("https://www.oig.hhs.gov/exclusions/exclusions_list.asp");
  </code></pre>
  
  <p>There seems to be an issue with the websites certificate, because I encounter this exception:</p>
  
  <p><code>The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel."  "The remote certificate is invalid according to the validation procedure.</code></p>
  
  <p>If you copy and paste the link into a browser, it requires you to agree to the risks before allowing you to view the site.  Its a government website, so I'm not worried about any viruses or anything.  Is there anyway to tell the web client to bypass this issue, and continue to the site?</p>