Add text to the end of an emf image

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C#

image

Metafile

Hi. I have this problem.
I want to draw text to an image, but at the end.

But how can i find the real size of the metafile?

what I am doing is this:

FileStream fs = new FileStream("1.emf", FileMode.Open);

          Metafile  m= new Metafile(fs);

           fs.Close();
           Graphics grfxVideo = CreateGraphics();
           IntPtr ipHdc = grfxVideo.GetHdc();
           Metafile mf = new Metafile("2.emf", ipHdc);
           grfxVideo.ReleaseHdc(ipHdc);
           Font newFont = new Font("Arial", 16, FontStyle.Bold);
           Graphics grfxMetafile = Graphics.FromImage(mf);



           grfxMetafile.DrawImage(m, 0, 0); //now 2.emf is the same with 1.emf


           int y = m.Height;


           float y1 = m.VerticalResolution;
          // SizeF size = m.PhysicalDimension;
           float testx = grfxMetafile.DpiX / 25.4f;
           grfxMetafile.DrawString("test message", SystemFonts.DefaultFont, SystemBrushes.Desktop,
               new PointF(0,y-100);
           //pictureBox1.Image = mf;

           grfxVideo.Dispose();
           mf.Dispose();
           grfxMetafile.Dispose();
           m.Dispose();

But the new emf file (2.emf) is very very long. So how can i find the end of the file, in order to draw text at it?