Disable Dates in a Calendar

From my previous experiences , what i have found out is that sometimes we need to disable the previous and coming dates in a calendar control. So finally i thought to post it out. It goes like this....,



protected void Calendar1_DayRender(object sender, DayRenderEventArgs e)
{
if (e.Day.Date< DateTime.Today)
{
e.Day.IsSelectable = false;
e.Cell.ToolTip = "This date is not available";
}
else if (e.Day.Date> DateTime.Today)
{
e.Day.IsSelectable = false;
e.Cell.ToolTip = "This date is not available";
}
}

Keep rockiin........