读取和修改计算机系统时间

using  System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential)]
public   class  SystemTime
... {
    public ushort year;
    public ushort month;
    public ushort dayOfWeek;
    public ushort day;
    public ushort hour;
    public ushort minute;
    public ushort second;
    public ushort milliseconds;
}
[DllImport( " Kernel32.dll " )]
public   static   extern   void  GetSystemTime([In, Out] SystemTime st);

[DllImport( " Kernel32.dll " )]
public   static   extern   bool  SetSystemTime([In, Out] SystemTime st);

SystemTime vSystemTime  =   new  SystemTime();
GetSystemTime(vSystemTime);  //  读
vSystemTime.year  +=   1 ;
SetSystemTime(vSystemTime);  //  写