AjaxFileUpload does not allow uploading of files with no extension

[ranasrule]

The AJAX Control Toolkit \20.1.0>

The installation method

• [ ] Installer
• [ x] NuGet package
• [ ] A custom build from the source code

Minimal steps to reproduce the bug

try to upload file with no extension using AjaxFileUpload

Actual result

upload is not allowed

Expected result

upload should be allowed

Browser(s) used

firefox and chrome latest versions

A site deployment method

• [ x] VS development web-server,
• [ x] IIS