Adding a new file extension

Morning,

I've got a page which is generating a PNG image, but some sites (phpBB sites at least) are reading the file as invalid. I think that it may be because I'm using a .ashx extension instead of a .png extension. Can I configure my site to process .png files?

 

Yes, I want ASP.NET to process C# with a .png extension.

 

Thanks - I'll raise a tickets