PixelFarm.Drawing.Fonts.NativeFontFace.OnDispose C# (CSharp) Method

        protected override void OnDispose()
        {
            if (this.ftFaceHandle != IntPtr.Zero)
            {
                NativeMyFontsLib.MyFtDoneFace(this.ftFaceHandle);
                ftFaceHandle = IntPtr.Zero;
            }
            if (unmanagedMem != IntPtr.Zero)
            {
                Marshal.FreeHGlobal(unmanagedMem);
                unmanagedMem = IntPtr.Zero;
            }

        }
        /// <summary>