how to convert date format dd/mm/yy to dd/mm/yyyy in c# code example

Example 1: c# date to string yyyy-mm-dd

var date_string = date.ToString("yyyy-MM-dd");

Example 2: c# date string format yyyy-mm-dd

public static string FORMAT_PDF = "dd/MM/yyyy";
public static string convertDateTimeFormatByStrDate(string strDate,string format)
{
	DateTime temp = Convert.ToDateTime(strDate);
	return temp.ToString(format);
}