C# 6.0 simple time units

TimeUnits.cs

using System;
using TimeUnits;

public static class Program
{
    public void Main()
    {
        Console.WriteLine(70.5 * s);
    }
}

// TODO: what does NodaTime do?

public static class TimeUnits
{
    public static TimeUnit ms { get; } = new TimeUnit(TimeSpan.FromMilliseconds(1));
    public static TimeUnit s { get; } = new TimeUnit(TimeSpan.FromSeconds(1));
    public static TimeUnit min { get; } = new TimeUnit(TimeSpan.FromMinutes(1));
    public static TimeUnit h { get; } = new TimeUnit(TimeSpan.FromHours(1));
    public static TimeUnit d { get; } = new TimeUnit(TimeSpan.FromDays(1));
}

public class TimeUnit
{
    public TimeUnit(TimeSpan value)
    {
        Value = value;
    }
    
    public TimeSpan Value { get; private set; }
    
    public static TimeSpan operator *(int amount, TimeUnit unit)
    {
        return new TimeSpan(amount * unit.Value.Ticks);
    }
    
    public static TimeSpan operator *(double amount, TimeUnit unit)
    {
        return TimeSpan.FromMilliseconds(amount * unit.Value.TotalMilliseconds);
    }
}