Outputing an array to a textbox ?

hey all ... just wondering if someone knows how to convert an array to a textbox. I have a StreamReader that reads in 3200 chars, and im tring to output them into a textbox, however it will only display one char. I have tried using a for loop to copy them also, but they just overwrite the first char.

Code:

        private void inputTextBox_KeyDown(object sender, KeyEventArgs e)
        {
            if(e.KeyCode == Keys.Enter)
            {
                string fileName;

                fileName = inputTextBox.Text;

                if(File.Exists(fileName))
                {

                    try
                    {
                        StreamReader stream = new StreamReader(fileName);
                        stream.ReadBlock(ASCIIHeader, 0, 3200);
                        outputFileTextBox.Text = Convert.ToString(ASCIIHeader);  // problem only outputs one char !
                    }
                    catch (IOException)
                    {
                        MessageBox.Show("Error reading from file", "File Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    }
                }
            }
        }

Thanks for any help

Try this:

Code:

outputFileTextBox.Text = new string ( ASCIIHeader );

Thanks, that worked great!