days calculation

private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)

        {

            textBox1.Text = DateTime.Now.ToShortDateString();

          

        }

        private void linkLabel2_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)

        {

            textBox2.Text = DateTime.Now.ToShortDateString();

        }

     

        private void button1_Click(object sender, EventArgs e)

        {

            TimeSpan t;

            t = Convert.ToDateTime(textBox2.Text) - Convert.ToDateTime(textBox1.Text);

            label1.Text = t.TotalDays.ToString();

        }