private void Execute(object sender, EventArgs e)
    {
        string task = TaskQue.Pop();

        //execute task;
        listBox1.DataSource = TaskQue.GetTasks();
    }
 public Form1()
 {
     InitializeComponent();
     listBox1.DataSource = TaskQue.GetTasks();
 }
 private void AddTask(object sender, EventArgs e)
 {
     TaskQue.Push(textBox1.Text);
     listBox1.DataSource = TaskQue.GetTasks();
 }