Finally, it has become possible to easily add AJAX file uploading capabilities to ASP.NET applications. The newly released version of the AJAX Control Toolkit ships with two new controls, one of them is called AsyncFileUpload control. AsyncFileUpload is an ASP.NET AJAX Control that allows you asynchronously upload files to server. The file uploading results can be checked both in the server and client sides. Using AsyncFileUpload Control in ASP.NET AJAX is simple.