[時間的乘法運算] #dotnet

MultiplyTimeSpan.cs

void Main()
{
    DemoMultiplyTimeSpan();
    DemoTimePlusMultiplyTimeSpan();
}

// Define other methods and classes here
void DemoMultiplyTimeSpan()
{
    var duration = TimeSpan.FromMinutes(1);
    duration = TimeSpan.FromTicks(duration.Ticks * 12);
    Console.WriteLine(duration);
    // 00:12:00
}

void DemoTimePlusMultiplyTimeSpan()
{
    var now = DateTimeOffset.Now;
    
    Console.WriteLine(now);
    // 1/7/2019 1:40:27 PM +08:00
    Console.WriteLine(now + MultiplyTimeSpan(TimeSpan.FromMinutes(1), 12));
    // 1/7/2019 1:52:27 PM +08:00
}

TimeSpan MultiplyTimeSpan(TimeSpan duration, double deviation)
{
    return TimeSpan.FromTicks((long)Math.Round(duration.Ticks * deviation));
}