Error handling

Hi guys, privet vsem.

I had some problems installing nop on a site. Well actually that was my fault, but i saw the default error page only, not really informative.

May i suggest a solution?
It is like a page template in a root folder, like this
http://canadianconsumer.info/ErrorPageTemplate.htm

In HttpModule(NopCommerceFilter) i added a method at the end of Application_EndRequest:
private void CheckErrors(HttpContext httpContext)
        {
            if (httpContext.AllErrors == null || httpContext.AllErrors.Length == 0)
                return;

            try
            {
                const string errDesc = "<!--ErrorDesc-->";
                string errors = string.Empty;
                
                foreach (Exception e in httpContext.AllErrors)
                {
                    Exception ex;
                    if (e.InnerException == null)
                        ex = e;
                    else
                        ex = e.InnerException;

                    errors += string.Format("Reason : {0}<br>Page : {1}<br><br>",
                        ex.Message, httpContext.Request.Url.AbsoluteUri);
                    errors += "<!--StackTrace : " + ex.StackTrace + "-->";
                }

                string path = httpContext.Server.MapPath("ErrorPageTemplate.htm");
                string file = File.ReadAllText(path);
                int pos = file.IndexOf(errDesc);
                file = file.Insert(pos, errors);

                path = path.Replace("Template", "");
                File.WriteAllText(path, file);

            }
            catch
            { }
            
        }

So if there are any unhandled exceptions(f.e., user was deactivated), user will see an error page with a reason and description.
http://canadianconsumer.info/ErrorPage.htm