c# 修改系统日期格式

  引用 using System.Runtime.InteropServices;

         [DllImport("kernel32.dll", EntryPoint = "GetSystemDefaultLCID")]
         public static extern int GetSystemDefaultLCID();
         [DllImport("kernel32.dll", EntryPoint = "SetLocaleInfoA")]
         public static extern int SetLocaleInfo(int Locale, int LCType, string lpLCData);
         public const int LOCALE_SLONGDATE = 0x20;
         public const int LOCALE_SSHORTDATE = 0x1F;
         public const int LOCALE_STIME = 0x1003;

         public void SetDateTimeFormat()
         {
             try
             {
                 int x = GetSystemDefaultLCID();
                 SetLocaleInfo(x, LOCALE_STIME, "HH:mm:ss");        //时间格式
                 SetLocaleInfo(x, LOCALE_SSHORTDATE, "yyyy-MM-dd");   //短日期格式
                 SetLocaleInfo(x, LOCALE_SLONGDATE, "yyyy-MM-dd");   //长日期格式
             }
             catch (Exception ex)
             {
                 Console.WriteLine(ex);
             }
         }