Plugin initialization error for IHtmlHeaderExtension

Hi ,

I am creating a custom widget to redirect the pages to oauth login pages  

code :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Web;
using System.Web.UI;
using Telligent.Evolution.Extensibility.Api.Entities.Version1;
using Telligent.Evolution.Extensibility.Api.Version1;
using Telligent.Evolution.Extensibility.UI.Version1;
using Telligent.Evolution.Extensibility.Version1;
namespace Web.Community.Extensions.Plugins
{
    public class Redirect : IPlugin, IHtmlHeaderExtension, IHttpCallback
    {
        public string Description
        {
            get { return "Redirects login, password and registration links"; }
        }

        public string Name
        {
            get { return "  Redirect Plugin"; }
        }

        public void Initialize()
        {

        }

        public void ProcessRequest(System.Web.HttpContextBase httpContext)
        {

        }

        public string GetHeader(RenderTarget target)
        {
            object obj = (Object)null;
            if(HttpContext.Current.CurrentHandler is Page)
                obj = (Page)HttpContext.Current.CurrentHandler;
            if (HttpContext.Current.CurrentHandler is PageHandler)
                obj = (PageHandler)HttpContext.Current.CurrentHandler;
            // PageHandler page = HttpContext.Current.CurrentHandler as PageHandler;

            if (obj != null)
            {
                User accessingUser = TelligentPublicApi.Users.AccessingUser;
                if (TelligentPublicApi.Url.CurrentContext != null && accessingUser != null )
                {
                   

                    //fix for language - set all users to en-US
                    //run as the admin user
                    TelligentPublicApi.Users.RunAsUser("admin", () =>
                    {
                        if (accessingUser.Language != "en-US")
                        {
                            UsersUpdateOptions userOptions = new UsersUpdateOptions();
                            userOptions.Id = accessingUser.Id;
                            userOptions.Language = "en-US";

                            List<ProfileField> profile = new List<ProfileField> {
                                        new ProfileField {
                                            Label = "Language",
                                            Value = "en-US"
                                        }
                            };

                            userOptions.ProfileFields = profile;

                            TelligentPublicApi.Users.Update(userOptions);
                        }
                    });

                    int accessingUserId = Convert.ToInt32(accessingUser.Id.ToString());
                    //check if this is the change password page

                    switch (TelligentPublicApi.Url.CurrentContext.PageName)
                    {
                        case "user-changepassword":
                            HttpContext.Current.Response.Redirect( Utilities.GetPluginConfigurationValue<Auth0Client>("_ChangePasswordUrl"));
                            break;

                        //check if this is the forgotten password page
                        case "user-forgottenpassword":
                            HttpContext.Current.Response.Redirect(Utilities.GetPluginConfigurationValue<Auth0Client>("_ForgottenPasswordUrl"));
                            break;

                        //check if this is the registration page
                        case "user-createuser":
                            HttpContext.Current.Response.Redirect(Utilities.GetPluginConfigurationValue<Auth0Client>("_RegistrationUrl"));
                            break;
                        case "user-consent":
                            break;

                        case "email-verification":
                            if (Utilities.IsEmailVerified(accessingUserId) || !Utilities.IsLoggedIn(accessingUserId))
                            {
                                HttpContext.Current.Response.Redirect($"{HttpContext.Current.Request.Url.Scheme}://{HttpContext.Current.Request.Url.Host}/");
                            }
                            break;

                        //check if this is the login page
                        case "common-login":
                            //check if the user is already logged in
                            if (!Utilities.IsLoggedIn(accessingUserId))
                            {
                                //get clean login url (no querystring)
                                Telligent.Evolution.Extensibility.Api.Version1.CoreUrlLoginOptions loginOptions = new Telligent.Evolution.Extensibility.Api.Version1.CoreUrlLoginOptions();
                                loginOptions.ReturnToCurrentUrl = false;

                                string loginUrl = TelligentPublicApi.CoreUrls.LogIn(loginOptions);
                                string homeUrl = TelligentPublicApi.CoreUrls.Home();

                                //get any querystring paramaters
                                string tokenKey = HttpContext.Current.Request.QueryString["oauth_data_token_key"];
                                string returnUrl = HttpContext.Current.Request.QueryString["ReturnUrl"];
                                string useOAuth = HttpContext.Current.Request.QueryString["UseOAuth"];
                                string errors = HttpContext.Current.Request.QueryString["Errors"];


                                //handle override to ignore oAuth redirect
                                bool redirectToOAuth = true;
                                if (!string.IsNullOrEmpty(useOAuth))
                                {
                                    if (useOAuth == "false")
                                    {
                                        redirectToOAuth = false;
                                    }
                                }

                             

                                if (string.IsNullOrEmpty(tokenKey) && redirectToOAuth && string.IsNullOrEmpty(errors))
                                {
                                    //load oauth plugin to get auth url
                                    var OAuthPlugin = Telligent.Evolution.Extensibility.Version1.PluginManager.Get<Auth0Client>().FirstOrDefault();
                                    if (OAuthPlugin != null)
                                    {
                                        HttpContext.Current.Response.Redirect(OAuthPlugin.GetAuthorizationLink());
                                    }
                                }
                            }
                            break;

                        case "common-logout":
                            // do nothing, do not remove
                          break;

                        default:
                            if (Utilities.IsLoggedIn(accessingUserId) && !Utilities.IsEmailVerified(accessingUserId))
                            {
                                var emailVerificationUrl = HttpContext.Current.Request.Url.Scheme + "://" + HttpContext.Current.Request.Url.Host + "/p/email-verification";
                                HttpContext.Current.Response.Redirect(emailVerificationUrl);
                            }
                           
                            break;
                    }

                }
            }

            return string.Empty;
        }
        public void SetController(IHttpCallbackController controller)
        {

        }

        public bool IsCacheable
        {
            get { return false; }
        }

        public bool VaryCacheByUser
        {
            get { return false; }

        }
    }
}

The pages are redirected to specified in the configuration,

But its throwing a plugin initialization error  when requesting these pages , login ,logout.

UnknownException: An error ocurred while rendering an HTML header extention. ---> System.Threading.ThreadAbortException: Thread was being aborted.
   at System.Threading.Thread.AbortInternal()
   at System.Threading.Thread.Abort(Object stateInfo)
   at System.Web.HttpResponse.AbortCurrentThread()
   at System.Web.HttpResponse.Redirect(String url, Boolean endResponse, Boolean permanent)



whats wrong with the code

Thanks