Can you make an alpha transparent PNG with C#?

Question

I have a multi-browser page that shows vertical text.

As an ugly hack to get text to render vertically in all browsers I\'ve created a custom page handler that retur

Answer 1

You should at least specify a 32bits pixel format (ex: PixelFormat.Format32bppArgb) when creating your bitmap, otherwise GDI+ cannot manage transparency.

To tune the resulting file when saving, you can use Save with ImageCodecInfo and EncoderParameters.