Ext.Net.RequestManager.HasXMicrosoftAjaxHeader C# (CSharp) Method

        public static bool HasXMicrosoftAjaxHeader(HttpRequest request)
        {
            string[] values = HttpContext.Current.Request.Headers.GetValues("X-MicrosoftAjax");

            if (values != null)
            {
                foreach (string value in values)
                {
                    if (value.ToLower().Contains("delta=true"))
                    {
                        return true;
                    }
                }
            }

            return false;
        }