.net format string seconds yyyy-MM-dd hh:mm:ss.fff{1,3} code example

Example: 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);
}