Calling this:
Noesis.BitmapImage bitmapImage = new Noesis.BitmapImage(new Uri("C:\Test Space\image.bmp));

Results in a FileNotFoundException because the path provide by the FileTextureProvider converts the space to a %20
public class FileSystemTextureProvider : FileTextureProvider
{
public FileSystemTextureProvider()
{
}

    public override Stream OpenStream(string path)
    {
        return new FileStream("C:\Test%20Space\image.bmp", FileMode.Open, FileAccess.Read);  // Crash due to space converted to %20
    }
}