openFileDialog on a Pocket PC Device

Question

I have never worked with C# and I'm having problems with even the simplest tasks.  I have to convert some C code into C# but also while working on a Pocket PC Device.  I noticed that there are a lot of members that are not supported by the Pocket PC platform.  So my question is, what is the C# code to be able to open a file on a Pocket PC?

This is what I have, but I get an error because OpenFile() is not supported by Pocket Pc:

private void butLoad_Click(object sender, EventArgs e)
        {
            Stream myStream;
            OpenFileDialog openFileDialog1 = new OpenFileDialog();

            openFileDialog1.InitialDirectory = "c:\\";

            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                if ((myStream = openFileDialog1.OpenFile()) != null)
                {
                    // Insert code to read the stream here.
                    myStream.Close();
                }
            }
           
        }

Any help is appreciated.  If anybody knows how to open just a file in an 8-bit grey scale, that would also be helpful.

Thanks