// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002554/object-isvalidulong

​

// @nuget: Z.ExtensionMethods

​

using System;

public class Program

{

    public static void Main()

    {

        string format = "{0, -40} {1, -15}";

        object [] values = { "-128" , "89","ABC", "true", "12/31/2018", "899", ".", "546565255465", "10888", "5465665", "4/2/2007 7:23:57 PM -07:00"};

        Console.WriteLine(format, "Object", "Is Valid ushort");

        Console.WriteLine(format, "------", "---------------");

        foreach(var val in values)

        {

            // C# Extension Method: Object - IsValidULong

            Console.WriteLine(format, val, val.IsValidULong());

        }

    }

}