using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(""); // 

        Console.WriteLine("-- there is no difference between string and String (capital S) in C#");

        string str1= "Hello";

        String str2 = "World!";

        Console.WriteLine(str1.GetType().FullName); // System.String

        Console.WriteLine(str2.GetType().FullName); // System.String

​

        Console.WriteLine(""); // a string is a collection or an array of characters

        Console.WriteLine("-- String as char Array");

        char[] chars = {'H','e','l','l','o'};

​

        string strChars1 = new string(chars);  

        foreach (char c in strChars1)

        {

            Console.WriteLine(c);

        }

        Console.WriteLine(""); // double quotes "

        Console.WriteLine("-- Special Characters - double quotes");

        Console.WriteLine("This is a \"string\" in C#.");

​

        Console.WriteLine(""); // Escape Char \

        Console.WriteLine("-- Special Characters - Escape Char");

        Console.WriteLine("This is a \"string\" in C#.");

        Console.WriteLine("xyzdef\\rabc");

        Console.WriteLine("\\\\mypc\\ shared\\project");

        Console.WriteLine(""); // Escape Sequence - @ indicates that it should be treated as a literal and should not escape any character

        Console.WriteLine("-- Special Characters - Escape Sequence");

        Console.WriteLine(@"xyzdef\rabc");

        Console.WriteLine(@"\\mypc\shared\project");

        Console.WriteLine(@"test@test.com");

        Console.WriteLine(""); //  $ Composite formatting / String interpolation is a C# 6.0 feature

        Console.WriteLine("-- Composite formatting");

        string name = "Mark";

        var date = DateTime.Now;

        Console.WriteLine("Hello, {0}! Today is {1}, it's {2:HH:mm} now.", name, date.DayOfWeek, date);

​

    }

}