Strings in C# with some properties examples, C#

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            //This is a substring example
            Console.WriteLine("THIS is Substring Example" + "\n");
            string str = "Last night I dreamt of San Pedro";
            Console.WriteLine(str);
            string substr = str.Substring(23);
            Console.WriteLine(substr + "\n");
         
         //This is .Join Exapmle  
         Console.WriteLine("THIS is .Join Example"+ "\n");
         string[] starray =new string[]{"Down the way nights are dark",
        "And the sun shines daily on the mountain top",
        "I took a trip on a sailing ship",
        "And when I reached Jamaica",
        "I made a stop"};
         string stri = String.Join("\n", starray);
        Console.WriteLine(stri + "\n");
        
            //This is an example of string.Compare
        Console.WriteLine("This is .Compare example" +"\n");    
        string str1 = "This is test";
        string str2 = "This is text";
        if (String.Compare(str1, str2) == 0)
        {
        Console.WriteLine(str1 + " and " + str2 + " are equal.");
        }
        else
        {
        Console.WriteLine(str1 + " and " + str2 + " are not equal.");
        }
}

}
   }

Show compiler warnings [ + ] Show input
Compilation time: 0,14 sec, absolute running time: 0,09 sec, cpu time: 0,08 sec, average memory usage: 14 Mb, average nr of threads: 3