The timer in this c# program does not function
<p>When I type in a letter I get the current time which I have declared at the top and it does not work because after the certain amount of time declared the letter isn't locked in.</p>

<p>for example It will go from p to Q after 5 secs when I want it to go p(then save the letter in the textbox) then p again allowing me to make words </p>

<p>here is my code:</p>

<pre><code>namespace MiniKeyboardAssignment
{
    public partial class Form1 : Form
    {
        //How long i've set my interval to go for, this means how long my timer will be on for before the current letter is saved//
        int timerinterval = 2000;


        bool button_but1 = true;
        int Button1_clicked = -1;
        bool button_but2 = true;
        int Button2_clicked = -1;
        bool button_but3 = true;
        int Button3_clicked = -1;
        bool button_but4 = true;
        int Button4_clicked = -1;
        bool button_but5 = true;
        int Button5_Clicked = -1;
        bool button_but6 = true;
        int Button6_clicked = -1;
        bool button_but7 = true;
        int Button7_clicked = -1;
        bool button_but8 = true;
        int Button8_clicked = -1;
        bool button_but9 = true;
        int Button9_clicked = -1;
        bool button_but10 = true;
        int Button10_clicked = -1;
        bool button_but12 = true;
        int Button12_clicked = -1;

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            Mode_TextBox.Text = "Multipress";
        }


        private void timer1_Tick(object sender, EventArgs e)
        {
            counter = Convert.ToInt16(textBox1.Text);
            counter++;
            textBox1.Text = Convert.ToString(counter);
            timer1.Enabled = true; 
     }

        private void Button1_Click(object sender, EventArgs e)
        {
            string sequence1 = "1";
            if (button_but1 == true)
            {
                Button1_clicked++;
                textbox.Text = Convert.ToString(ListBox1.Items[Button1_clicked]);
                listBox11.Items.Add(sequence1);
                counter++;
                textBox1.Text = Convert.ToString(counter);
                button_but1 = false;
                timer1.Enabled = true;
            }
            else
            {
                Button1_clicked++;
            }
            characterstring[Convert.ToInt16(textBox1.Text)] = Convert.ToString(ListBox1.Items[Button1_clicked]);
            textbox.Text = characterstring[0] + characterstring[1] + characterstring [2] + characterstring [3] + characterstring [4] + characterstring [5] + characterstring [6] + characterstring [7] + characterstring [8] + characterstring [9] + characterstring [10] + characterstring [11] + characterstring [12] + characterstring [13] + characterstring [14] + characterstring [15] + characterstring [16] + characterstring [17] + characterstring [18] + characterstring [19] + characterstring [20];
        }
</code></pre>
