internal WorkTime Reduce(WorkTime c)
{
var w = new WorkTime {
Hour = this.Hour, Minute = this.Minute
};
w.Hour -= c.Hour;
w.Minute -= c.Minute;
w.Check();
return(w);
}
internal WorkTime Append(int hour, int minute)
{
var w = new WorkTime {
Hour = this.Hour, Minute = this.Minute
};
w.Hour += hour;
w.Minute += minute;
w.Check();
return(w);
}
