ASP.NET RImageOrFlashControl makes it possible to show a picture or a flash on your web-page depending on the file type. If a file extension is swf, then <object> tag corresponding to the flash, or <img> will be rendered on the page. Likewise, using the properties of this control you can establish all the parameters necessary to show your flash.
100% .NET Managed Code
Doesn't require installation
Supports all .NET languages
Easy to use
possible to use in Web applications
Features:
automatically determines the file type
allows to establish all necessary parameters for the flash
Also:
Free to use (freeware)
Free support
FREE updates (including major version upgrades)