从同一文本框中读取不同的int

Question

I´m little new to C# and i got some questions here:

I want to send my age in hex codes by serial port to a device that my pc is attached with. I have those codes but i have to read from textBox the age inputed.

For example: at textBox I enter my age (24) and each number has a hex code. So how do i read from textBox each number? I think that is what i have to do, I read number 2, send hex code, then read the second number and send hex code. Have I been clear?

EDIT: Just showing u guys my code after i got awnsered. Thanks all :)

 private void btnConfirmaIdade_Click(object sender, EventArgs e)
    {
        string allValue = mtxbIdade.Text;

        foreach (char c in allValue)
        {
            MandaIndadeSerial(c);
        }

    }

    public void MandaIndadeSerial(char c)
    {
        switch (c)
        {
            case '1':
                EnviarComando("0232363b3bde03");// send hexa code to device by serial
                    break;

Answer 1

foreach(char c in TextBox.Text)
{
  // TODO: send current number. Cast to string if needed: (string)c 
}

This code iterates through all numbers/characters in TextBox, left to right, and allows you to process/send them separately.

Answer 2

string numbers = new string[2];
numbers[0] = textbox.Text.Substring(0,1);  //first character in textbox
numbers[1] = textbox.Text.Substring(1,1);  //second character