[C#] 如何變更本機電腦日期、變更本機電腦時間，來作 時間同步校正

主要需求是因為 有些 Client 端 PC 都是服役多年的老 PC 所以 BIOS 電池都沒力了，又懶得一台一台換。

所以直接從 SQL Server 端 作時間的校正。

 [DllImport("Kernel32.dll")]
 private extern static uint SetLocalTime(ref SYSTEMTIME lpSystemTime);

 [StructLayout(LayoutKind.Sequential)]
        private struct SYSTEMTIME
        {
            public ushort wYear;
            public ushort wMonth;
            public ushort wDayOfWeek;
            public ushort wDay;
            public ushort wHour;
            public ushort wMinute;
            public ushort wSecond;
            public ushort wMilliseconds;
        }

 public void SetTime(DateTime SqlServerTime)
        {
            SYSTEMTIME st = new SYSTEMTIME();
            st.wYear = Convert.ToUInt16(SqlServerTime.Year);
            st.wMonth = Convert.ToUInt16(SqlServerTime.Month);
            st.wDay = Convert.ToUInt16(SqlServerTime.Day);
            st.wHour = Convert.ToUInt16(SqlServerTime.Hour);
            st.wMilliseconds = Convert.ToUInt16(SqlServerTime.Millisecond);
            st.wMinute = Convert.ToUInt16(SqlServerTime.Minute);
            st.wSecond = Convert.ToUInt16(SqlServerTime.Second);
            SetLocalTime(ref st);
        }

//使用時
  ChangeLocalDateTime CLDT = new ChangeLocalDateTime();
 CLDT.SetTime(db_dt); //db_dt 是指從 SQL Server 取回來的 GETDATE()