using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        string str = "oinicial";

        Console.WriteLine(str);

        change(str);

        Console.WriteLine(str);

        var list = new List<string>{"TENANT_Index1","TENANT_Index0", "TENANT_Index10","TENANT_"};

        Console.WriteLine(string.Join(",", list));

        list = list.Select(x => x.Remove(0, null.Length)).ToList();

        Console.WriteLine(string.Join(",", list));

        list = list.Where(x => x.StartsWith("")).ToList();

        Console.WriteLine(string.Join(",", list));

    }

    private static void change(string str){

        str = str + "fsd";

        Console.WriteLine(str);

    }

}