Persial Calender

using System.Globalization;

public string Miladi2Shamsi(DateTime _date)
{
    PersianCalendar pc = new PersianCalendar();
    StringBuilder sb = new StringBuilder();
    sb.Append(pc.GetYear(_date).ToString("0000"));
    sb.Append("/");
    sb.Append(pc.GetMonth(_date).ToString("00"));
    sb.Append("/");
    sb.Append(pc.GetDayOfMonth(_date).ToString("00"));
    return sb.ToString();
}

string today = Miladi2Shamsi(DateTime.Now);