Calendar Controls in Webforms

Question

I want to take the selected date from the calendar control and pass to the argument.

protected void Calendar1_SelectionChanged(object sender, System.EventArgs e)
{
_availebletimeSlotsRoom1 = new BindingList<string>(_allTimeSlots.ToList());
_availebletimeSlotsRoom2 = new BindingList<string>(_allTimeSlots.ToList());
_availebletimeSlotsRoom3 = new BindingList<string>(_allTimeSlots.ToList());
_availebletimeSlotsRoom4 = new BindingList<string>(_allTimeSlots.ToList());
DLAvailTS1.DataSource = _availebletimeSlotsRoom1;
DLAvailTS2.DataSource = _availebletimeSlotsRoom2;
DLAvailTS3.DataSource = _availebletimeSlotsRoom3;
DLAvailTS4.DataSource = _availebletimeSlotsRoom4;
UpdateRoom(1, e.Start, _availebletimeSlotsRoom1); //ERROR HERE:'EventArgs' does not contain a definition for 'Start' and no extension method 'Start' accepting a first argument of type 'EventArgs' could be found (are you missing a using directive or an assembly reference?)
UpdateRoom(2, e.Start, _availebletimeSlotsRoom2);
UpdateRoom(3, e.Start, _availebletimeSlotsRoom3);
UpdateRoom(4, e.Start, _availebletimeSlotsRoom4);
}

This procedure starts after a change of the selected dates in the Calendar1 control.

 

Parameter 'e' does not have not property Start.

 

How can I get the Start from the Calendar Object