Lambda

using System;
using System.Collections.Generic;
using System.Linq;

class Program
{
static void Main()
{
List<MemberIVE> iveMembers = new List<MemberIVE>
{
new MemberIVE { Name = "Gaeul", Position = "Main Dancer, Lead Rapper", Age = 23 },
new MemberIVE { Name = "Yujin", Position = "Leader, Main Vocalist", Age = 22 },
new MemberIVE { Name = "Rei", Position = "Main Rapper, Sub Vocalist", Age = 22 },
new MemberIVE { Name = "Wonyoung", Position = "Vocalist", Age = 21 },
new MemberIVE { Name = "Liz", Position = "Main Vocalist", Age = 21 },
new MemberIVE { Name = "Leeseo", Position = "Vocalist, Lead Dancer", Age = 19 }
};

MemberIVE gaeul = iveMembers.Find(m => m.Name == "Gaeul");

var eldestMembers = iveMembers.Where(m => m.Age >= 23).ToList();

Console.WriteLine($"--- Profile: {gaeul.Name} ---");
Console.WriteLine($"Position: {gaeul.Position}");
Console.WriteLine($"Age: {gaeul.Age} years old\n");

Console.WriteLine("--- IVE Members aged 23 or older ---");
eldestMembers.ForEach(m => Console.WriteLine($"- {m.Name} ({m.Age} years old)"));
}
}

class MemberIVE
{
public string Name { get; set; }
public string Position { get; set; }
public int Age { get; set; }
}