Синтаксис

#pragma pack(push,1)
typedef struct
{
    WORD    wYear;          // Год (1601 - 30827)
    WORD    wMonth;         // Месяц(Январь = 1, Февраль = 2, ...)
    WORD    wDayOfWeek;     // День недели (Воскресенье = 0, Понедельник = 1, ...)
    WORD    wDay;           // День месяца (1-31)
    WORD    wHour;          // Час (0-23)
    WORD    wMinute;        // Минуты (0-59)
    WORD    wSecond;        // Секунды(0-59)
    WORD    wMilliseconds;  // Милисекунды(0-999)
} TGrdSystemTime;
#pragma pack(pop

    public struct GrdSystemTime
    {
        /// <summary>
        /// Год (1601 - 30827)
        /// </summary>
        public ushort wYear;
        /// <summary>
        /// Месяц(Январь = 1, Февраль = 2, ...)
        /// </summary>
        public ushort wMonth;
        /// <summary>
        /// День недели (Воскресенье = 0, Понедельник = 1, ...)
        /// </summary>
        public ushort wDayOfWeek;
        /// <summary>
        /// День месяца (1-31)
        /// </summary>
        public ushort wDay;
        /// <summary>
        /// Час (0-23)
        /// </summary>
        public ushort wHour;
        /// <summary>
        /// Минуты (0-59)
        /// </summary>
        public ushort wMinute;
        /// <summary>
        /// Секунды(0-59)
        /// </summary>
        public ushort wSecond;
        /// <summary>
        /// Милисекунды(0-999)
        /// </summary>
        public ushort wMilliseconds;
    }

public class GrdSystemTime
{
    /** The year (1601 - 2099) */
    public short mYear;
    /** The month (January = 1, February = 2, ...) */
    public short mMonth;
    /** The day of the week (Sunday = 0, Monday = 1, ...) */
    public short mDayOfWeek;
    /** The day of the month (1-31) */
    public short mDay;
    /** The hour (0-23) */
    public short mHour;
    /** The minute (0-59) */
    public short mMinute;
    /** The second (0-59) */
    public short mSecond;
    /** The millisecond (0-999) */
    public short mMilliseconds;
}