How to use HTTPS secure Page in URL in some Pages.

You may have to use https while Registration.

Please Add the Below code in Global.asax Page.

  protected void Application_BeginRequest(object sender, EventArgs e)
        {
            var currentUrl = System.Web.HttpContext.Current.Request.Url;
            if (currentUrl.AbsoluteUri.Contains("Registration"))
            {
                if (!currentUrl.Scheme.Equals(Uri.UriSchemeHttps, StringComparison.CurrentCultureIgnoreCase))
                {
                    //build the secure uri
                    var secureUrlBuilder = new UriBuilder(currentUrl);
                    secureUrlBuilder.Scheme = Uri.UriSchemeHttps;
                    //use the default port.
                    secureUrlBuilder.Port = string.IsNullOrEmpty(ConfigurationManager.AppSettings["HttpsPort"].ToString()) ? 443 : Convert.ToInt32(ConfigurationManager.AppSettings["HttpsPort"].ToString());
                    //redirect and end the response.
                    System.Web.HttpContext.Current.Response.Redirect(secureUrlBuilder.Uri.ToString());
                }
            }
        }