I am trying to familiarize myself with filestreams, but I have run
into the following issues.  I am hoping that someone can shed
some light on these issues for me please.

I am using the following sample code to write (keeping it simple)

       private void button1_Click(object sender, EventArgs e)
       {
           String DATFILE = Directory.GetCurrentDirectory() + "\\Test.dat";
           if (File.Exists(DATFILE))
               File.Delete(DATFILE);

           FileStream fs = new FileStream(DATFILE, FileMode.CreateNew);
           BinaryWriter br = new BinaryWriter(fs);

    for(int x = 0; x < 10; x++)
    {
               // Write the data using the BinaryWriter
               br.Write("Test: " + x);
            br.Write("Number: " + x);
    }

           br.Close();
           fs.Close();
}

And this to read.

       private void button2_Click(object sender, EventArgs e)
       {
           String DATFILE = Directory.GetCurrentDirectory() + "\\Test.dat";
           if (File.Exists(FILE_NAME))
           {
               FileStream fs = new FileStream(DATFILE, FileMode.Open,
FileAccess.Read);
               BinaryReader binr = new BinaryReader(fs);

               for (int x = 0; x < fs.Length; ++x)
               {
                   listBox1.Items.Add(binr.ReadString());
                   listBox1.Items.Add(binr.ReadInt32());
               }
           }
       }

Now my questions are.

1. How do you read the file from beginning to end, reading from the first
record until there is no more records?

* my reading code is not correct I already know that, that's why I am
asking.

2. When saving to the file, do you always have to replace the entire file,
or can
you just update the information whenever any single item has changed?

I still have to add delete, edit, and search to finish it off.  But this is
just
a start for me.

Thanks

John