Render more than one <img> in SetHtml()

[Naahks]

Is theire a solution, where more than one embedded Image can be rendered? At the Moment i can only parse one, and especially only the first one in the html-string, image which is getting rendered. The code is looking like this:
handler.OverloadImgReceivingFunc((s) => { return GetImage(s); });

But only one Image is rendered.....