windows controls

Question

Hi, i have two datetimepickers, Datetimpicker2  is exactlty 3months added to  datetimpicker1,but i am geing errors in seting Max and min value, can anyone Please help

Datetimepicker2.MinDate = Convert.ToDateTime(Datetimepicker1.Value);

Datetimepicker2.MaxDate = Convert.ToDateTime(Datetimepicker2.MinDate.AddMonths(3).ToString("dd/MMM/yyyy"));