AjaxControlToolkit.AjaxFileUploadHandler.ProcessRequest C# (CSharp) Method

        public void ProcessRequest(HttpContext context)
        {
            var request = context.Request;

            if(request.QueryString["contextKey"] != AjaxFileUpload.ContextKey)
                throw new Exception("Invalid context key");

            if(request.Headers["Content-Type"] != null &&
                request.Headers["Content-Type"].StartsWith("multipart/form-data;") &&
                request.Headers["Content-Length"] != null)
                AjaxFileUploadHelper.Process(context);
            else
                throw new Exception("Invalid upload request.");

            context.Response.ContentEncoding = Encoding.UTF8;
            context.Response.Cache.SetCacheability(HttpCacheability.NoCache);
            context.Response.End();
        }