Some UTF-8 encoded Unicode characters are rendered as empty rectangles in the html renderer. The sample code below . The sample below uses Mathematical Alphanumeric Symbols and produces the attached image file. This is u…... HTMLDocument doc = new HTMLDocument(โ<html><body><br>๐๐๐ฅ๐ฅ๐จ...ImageDevice(options, screenshotStream); doc.RenderTo(idv); File.WriteAllBytes(Path...