使用自定义字体问题

我有一个自定义字体文件，我想在我的应用程序上使用，目前我使用的是.net framework2，这是我使用的代码：

private void Form1_Load(object sender, EventArgs e)
{
    //load the resource
    Stream fontStream = this.GetType().Assembly.GetManifestResourceStream("Eurostile_Regular_0.ttf");
    //create an unsafe memory block for the data
    System.IntPtr data = Marshal.AllocCoTaskMem(Convert.ToInt16(fontStream.Length));
    //create a buffer to read in to
    byte[] fontdata = null;
    fontdata = new byte[fontStream.Length + 1];
    //fetch the font program from the resource
    fontStream.Read(fontdata, 0, Convert.ToInt16(fontStream.Length));
    //copy the bytes to the unsafe memory block
    Marshal.Copy(fontdata, 0, data, Convert.ToInt16(fontStream.Length));
    //pass the font to the font collection
    pfc.AddMemoryFont(data, Convert.ToInt16(fontStream.Length));
    //close the resource stream
    fontStream.Close();
    //free the unsafe memory
    Marshal.FreeCoTaskMem(data);
}

在Form1_Paint上：

private void Form1_Paint(object sender, PaintEventArgs e)
{
    bool bold = false;
    bool regular = false;
    bool italic = false;
    e.Graphics.PageUnit = GraphicsUnit.Point;
    SolidBrush b = new SolidBrush(Color.Black);
    float y = 5;
    System.Drawing.Font fn;
    foreach (FontFamily ff in pfc.Families)
    {
        if (ff.IsStyleAvailable(FontStyle.Regular))
        {
            regular = true;
            fn = new Font(ff, 18, FontStyle.Regular);
            e.Graphics.DrawString(fn.Name, fn, b, 5, y, StringFormat.GenericTypographic);
            fn.Dispose();
            y += 20;
        }
        if (ff.IsStyleAvailable(FontStyle.Bold))
        {
            bold = true;
            fn = new Font(ff, 18, FontStyle.Bold);
            e.Graphics.DrawString(fn.Name, fn, b, 5, y, StringFormat.GenericTypographic);
            fn.Dispose();
            y += 20;
        }
        if (ff.IsStyleAvailable(FontStyle.Italic))
        {
            italic = true;
            fn = new Font(ff, 18, FontStyle.Italic);
            e.Graphics.DrawString(fn.Name, fn, b, 5, y, StringFormat.GenericTypographic);
            fn.Dispose();
            y += 20;
        }
        if (bold && italic)
        {
            fn = new Font(ff, 18, FontStyle.Bold | FontStyle.Italic);
            e.Graphics.DrawString(fn.Name, fn, b, 5, y, StringFormat.GenericTypographic);
            fn.Dispose();
            y += 20;
        }
        fn = new Font(ff, 18, FontStyle.Underline);
        e.Graphics.DrawString(fn.Name, fn, b, 5, y, StringFormat.GenericTypographic);
        fn.Dispose();
        y += 20;
        fn = new Font(ff, 18, FontStyle.Strikeout);
        e.Graphics.DrawString(fn.Name, fn, b, 5, y, StringFormat.GenericTypographic);
        fn.Dispose();
    }
    b.Dispose();
}

但是字体不起作用，我从form_load 的第二行得到JIT错误

System.NullReferenceException：对象引用未设置为对象的实例。