Error on constructing XML from a file created by Visual Studio

[shaucky]

Problem Description

When constructing a XML from a file created by Microsoft Visual Studio, the runtime would throw a TypeError: Error #1088: The markup in the document following the root element must be well-formed.

Actually, there is a hidden character before the XML data. It's char code is 65279. Maybe AIR need to consider ignore hidden chars on constructing XML object.

Steps to Reproduce

Create a XML file by Visual Studio and write some text into it and then save the XML file as "test.xml" in the application dictionary.

Test the code:

package
{
	import flash.display.Sprite;
	import flash.filesystem.File;
	import flash.filesystem.FileStream;
	import flash.filesystem.FileMode;

	[SWF(width="960", height="560", fps="24")]
	public class test extends Sprite
	{
		private var fileStream:FileStream = new FileStream();
		private var file:File = new File();
		private var xml:XML;
		private var string:String;
		public function test()
		{
			file = File.applicationDirectory;
			file.url += "test.xml";
			fileStream.open(file, FileMode.READ);
			fileStream.position = 0;
			string = fileStream.readMultiByte(fileStream.bytesAvailable, "utf-8");
			trace(string);
			trace(string.charAt(0));
			trace(string.charCodeAt(0));
			xml = new XML(string);
		}
	}
}

Known Workarounds

Avoid create XML files by Visual Studio…

[shaucky]

GPT told me it's the UTF-8 BOM (Byte Order Mark)…