Using custom TTF font for Image rendering

using (var backgroundImage = new Bitmap(backgroundPath))
    using (var avatarImage = new Bitmap(avatarPath))
    using (var myFont = new Font("myCustom", 8f))
    {
        Graphics canvas = Graphics.FromImage(backgroundImage);
        canvas.DrawImage(avatarImage, new Point(0, 0));

        canvas.DrawString(username, myFont,
            new SolidBrush(Color.Black), new PointF(5, 5));

        return new Bitmap(backgroundImage);
    }

// 'PrivateFontCollection' is in the 'System.Drawing.Text' namespace
var foo = new PrivateFontCollection();
// Provide the path to the font on the filesystem
foo.AddFontFile("...");

var myCustomFont = new Font((FontFamily)foo.Families[0], 36f);