Error in Invalidcast exception type

Question

While logging the web page the global.asax.cs triggers the Application_AuthenticateRequest method and triggers the event handler Application_AuthenticateRequest method in securitymodule.cs .

But in my code it was not triggering the Application_AuthenticateRequest method in securitymodule.cs.Due to this getting exception like system.invalidcastexception:"Unable to cast object of type 'System.Web.Security.FormsIdentity' to type 'AllianzLife.WebServices.Security.AllianzIdentity'" in the line

 return ((AllianzIdentity)HttpContext.Current.User.Identity).Username;  in securitycontent.cs file.

 

Kindly can anyone help me on the same.

 

Global.asax.cs
protected void Application_AuthenticateRequest(object sender, EventArgs e)
{

}

 

SecurityModule.cs

public void Init(HttpApplication application)
{
this.application = application;
application.AuthenticateRequest += new EventHandler(Application_AuthenticateRequest); //Occurs when a security module has established the identity of the user

application.PreRequestHandlerExecute += new EventHandler(application_PreRequestHandlerExecute);
application.BeginRequest += new EventHandler(application_BeginRequest);
}

 

private void Application_AuthenticateRequest(object sender, EventArgs e)
{

if (HttpContext.Current.User != null && HttpContext.Current.User.Identity.IsAuthenticated &&HttpContext.Current.User.Identity is FormsIdentity)
{

 

FormsIdentity formsIdentity = (FormsIdentity) HttpContext.Current.User.Identity;
principal = new AllianzPrincipal(formsIdentity.Ticket);

 

HttpContext.Current.User = principal;

SecurityUtil.ResetAuthenticationTicket(principal);
}
}

}

 

Securitycontent.cs

public string Username

{

get

{

if (!HasAuthenticated)

{

return null;

}

return ((AllianzIdentity)HttpContext.Current.User.Identity).Username;

}

}