Reading a file byte by byte

Question

Hello everyone,

I'm trying to do an hex editor in C#. My plan is to read a file byte by byte and display the byte in a text box.

I have the code bellow but it works very slow. Does anyone know why it works so slow ??

/// <summary>

/// Opens a file chooser.

/// </summary>

///

private void openToolStripMenuItem_Click(object sender, EventArgs e)

{

openFileDialog.ShowDialog();

string fileName = openFileDialog.FileName;

FileStream fileReader = new FileStream(fileName, FileMode.Open, FileAccess.Read);

long length = fileReader.Length;

long position = 0;

while (position < length){
position++;
textBox.Text += fileReader.ReadByte() + "  ";
}

}


Best regards