Unity中肯定時間是否在必定範圍內

private string GetRegistData(string name)
    {
        string registData;
        RegistryKey hkml = Registry.CurrentUser;
        RegistryKey software = hkml.OpenSubKey("Software", true);
        RegistryKey aimdir = software.OpenSubKey("NewTimeyear", true);
        registData = aimdir.GetValue(name).ToString();
        return registData;


    }

    private void WTRegedit(string name, string tovalue)
    {
        RegistryKey hklm = Registry.CurrentUser;
        RegistryKey software = hklm.OpenSubKey("Software", true);
        RegistryKey aimdir = software.CreateSubKey("NewTimeyear");
        aimdir.SetValue(name, tovalue);
    }

    private bool IsRegeditExit(string name)
    {
        bool _exit = false;
        string[] subkeyNames;

        RegistryKey hkml = Registry.CurrentUser;
        RegistryKey software = hkml.OpenSubKey("Software", true);
        RegistryKey aimdir = software.OpenSubKey("NewTimeyear", true);
        if (aimdir == null)
        {
            return false;
        }
        subkeyNames = aimdir.GetSubKeyNames();

        foreach (string keyName in subkeyNames)
        {
            if (keyName == name)
            {
                _exit = true;
                return _exit;
            }
        }
        return _exit;


    }

　　

NowTime = DateTime.Now.ToLocalTime();
        Timeyear = DateTime.Now.ToLocalTime().ToString("yyyy-MM-dd");

if (!IsRegeditExit("TimeYear"))
{

WTRegedit("TimeYear", Timeyear);
}
RegTime = GetRegistData("TimeYear");

　　

DateTime DateReg = Convert.ToDateTime(RegTime);
        DateTime MaxDate = Convert.ToDateTime(MaxTime);
        DateTime MinDate = Convert.ToDateTime(MinTime);
        if (!((NowTime.CompareTo(MinDate) >= 0 && NowTime.CompareTo(MaxDate) <= 0)
            && (DateReg.CompareTo(MinDate) >= 0 && DateReg.CompareTo(MaxDate) <= 0)))
        {
            Application.Quit();

        }