Files Per Folder Limit in FileStream constructor

I have recently discovered that a .Net Compact Framework application was failing when there were too many files per folder with long file names.

Code was running on Pocket PC V 4.20.0 (Build 14053) running on ARM XScale. Storage Card is formated with FAT32. Pocket PC is using Compact Framework 1.0.

The code below fails at exactly 1000 files

private void button1_Click(object sender, System.EventArgs e)

    int i = 0;

    byte[] b = new byte[1];

    b[0] = 123;

    try

    {

        while(true)

        {

            i += 1;

            System.IO.FileStream fs = new System.IO.FileStream("\\Storage   Card\\FilesWithAFairlyLongNameMakeItWorse" + i.ToString(),System.IO.FileMode.Create);

           fs.Write(b,0,1);

           fs.Flush();

           fs.Close();

           textBox1.Text = i.ToString();

        }

    }

    catch (Exception ex)

    {

    System.Windows.Forms.MessageBox.Show("Exception " + ex.ToString() + " at file number " +   i.ToString());

    }

}

The exception is simply reported as "IOException" without any further details (or any way of getting them).

Interestingly.

System.IO.StreamWriter logStream = new System.IO.StreamWriter("\\Storage Card\\SwFile",true);

succeeds even when there are > 1000 files in a folder. Also one of the 1000 files can be pasted as a copy using File Explorer.