20180401b

using System;
using static System.Console;
using System.Linq;
using System.Collections;
using System.Collections.Generic;

namespace StringExtensions
{
    //Extension methods must be defined in a static class
    public static class MyStringExtension
    {
        // This is the extension method.
        // The first parameter takes the "this" modifier
        // and specifies the type for which the method is defined.
        public static string Capitalize(this string s)
        {
            if (string.IsNullOrEmpty(s)) return s;
            // else
            return s.Substring(0, 1).ToUpper() + s.Substring(1).ToLower();
        }

    }
}

namespace cs2
{
    using StringExtensions;

    class Program
    {
        private static string Input(string text = "")
        {
            Write(text);
            return ReadLine();
        }

        public static void Main(string[] args)
        {
            var name = Input("Your name: ");
            WriteLine("Hello {0}!", name.Trim().Capitalize());
        }
    }
}