Month Calendar. Работа с диапазонами дат

private void monthCalendar1_DateChanged(object sender, DateRangeEventArgs e) 
{ 
this.monthCalendar1.MaxSelectiоnCоunt = 365; 
this.textBox1.Text = this.monthCalendar1.SelectionRange.Start.ToLongDateString(); 
this.textBox2.Text = this.monthCalendar1.SelectionRange.End.ToLongDateString(); 
}

        public int i = 0;
 
        private void monthCalendar1_DateChanged(object sender, DateRangeEventArgs e)
        {
            this.monthCalendar1.MaxSelectionCount = 365;
            if (i == 0)
            {
                this.textBox1.Text = this.monthCalendar1.SelectionRange.Start.ToLongDateString();
                i = 1;
            }
            else
            {
                this.textBox2.Text = this.monthCalendar1.SelectionRange.End.ToLongDateString();
                i = 0;
            }
        }

var flag = true;

private void monthCalendar1_DateChanged(object sender, DateRangeEventArgs e) 
{ 
this.monthCalendar1.MaxSelectiоnCоunt = 365; 
if(flag){
this.textBox1.Text = this.monthCalendar1.SelectionRange.Start.ToLongDateString(); 
flag = false;
}
else
{
this.textBox2.Text = this.monthCalendar1.SelectionRange.Start.ToLongDateString(); 
flag = true;
 }
}