using System;
using System.Collections.Generic;
using System.Linq;
 
public class Test
{
	public static void Main()
	{
    List<Prop> list = new List<Prop>();
    list.Add(new Prop("voltage", 7));
    list.Add(new Prop("voltage", 24));
    list.Add(new Prop("systemconfiguration", 2451));
    list.Add(new Prop("systemunit", 0));
    list.Add(new Prop("systemunit", 15));
    list.Add(new Prop("voltage", 0));		
    var highestByTitle = list
        .GroupBy(t => t.title)
        .Select(g => g.OrderByDescending(t => t.val).First())
        .ToList();
    foreach (var p in highestByTitle) {
    	Console.WriteLine("{0} - {1}", p.title, p.val);
    }
 
 
	}
 
 
public class Prop {     
	public Prop(string t, int v) {title = t; val = v;}
    public string title {get;set;}
    public int val {get;set;}       
}   
 
}