how to fetch the current date into the textbox field after selecting the current date from calender in asp.net using c#

<asp:calendar id="Calendar1" runat="server" xmlns:asp="#unknown">
      onselectionchanged="Calendar1_SelectionChanged"></asp:calendar>

protected void Calendar1_SelectionChanged(object sender, EventArgs e)
       {
           var dt = Calendar1.SelectedDate.ToShortDateString();
           TextBox1.Text = Convert.ToString(dt);

       }