// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002424/int64-milliseconds

​

// @nuget: Z.ExtensionMethods

​

using System;

public class Program

{

    public static void Main()

    {

        Int64 [] values = { 1, 7, 30, 365, 1000, 2500, 10000, 15000, 32767 };

​

        Console.WriteLine("{0,21}{1,18}","Milliseconds", "TimeSpan");

        Console.WriteLine("{0,21}{1,18}","------------", "--------");

​

        foreach (Int64 value in values)

        {

            // C# Extension Method: Int64 - Milliseconds

            TimeSpan interval = value.Milliseconds();

            string timeInterval = interval.ToString();

​

            int pIndex = timeInterval.IndexOf(':');

            pIndex = timeInterval.IndexOf('.', pIndex);

            if (pIndex < 0) timeInterval += "        ";

​

            Console.WriteLine("{0,21}{1,26}", value, timeInterval);

        }

    }

}