Usage with a Button

public static class Res
{
    /// <summary>
    /// URL: https://www.behance.net/gallery/2846011/Manteka
    /// </summary>
    public static FontFamily Maneteke = GetResourceFontFamily(Properties.Resources.manteka);

    public static FontFamily GetResourceFontFamily(byte[] fontbytes)
    {
        PrivateFontCollection pfc = new PrivateFontCollection();
        IntPtr fontMemPointer = Marshal.AllocCoTaskMem(fontbytes.Length);
        Marshal.Copy(fontbytes, 0, fontMemPointer, fontbytes.Length);
        pfc.AddMemoryFont(fontMemPointer, fontbytes.Length);
        Marshal.FreeCoTaskMem(fontMemPointer);
        return pfc.Families[0];
    }
}

public class FlatButton : Button
{
    public FlatButton() : base()
    {
        Font = new Font(Res.Maneteke, Font.Size);
    }

    protected override void OnFontChanged(EventArgs e)
    {
        base.OnFontChanged(e);
        this.Font = new Font(Res.Maneteke, this.Font.Size);
    }
}