using System.Collections.Generic;
public static void Main()
Console.WriteLine("Hello World");
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){