TimeSpanFormatter

TimeSpanFormatter.cs

public static class TimeSpanFormatter
{
    public static string ToReadableString(TimeSpan ts)
    {
        var parts = new List<string>();

        if (ts.Days > 0)
            parts.Add($"{ts.Days} day{(ts.Days > 1 ? "s" : "")}");

        if (ts.Hours > 0)
            parts.Add($"{ts.Hours} hour{(ts.Hours > 1 ? "s" : "")}");

        if (ts.Minutes > 0)
            parts.Add($"{ts.Minutes} minute{(ts.Minutes > 1 ? "s" : "")}");

        if (ts.Seconds > 0)
            parts.Add($"{ts.Seconds} second{(ts.Seconds > 1 ? "s" : "")}");

        if (parts.Count == 0)
            return "0 seconds";

        return string.Join(", ", parts);
    }
}