Stackoverflow Suggest data structure suitable for key range lookup, 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)
        {
            var lookup = new RangeDictionary<string>();
            lookup.Add( 5, 15, "King");
            lookup.Add( 35, 50, "Bear");
            lookup.Add( 25, 40, "Doll");

public IEnumerable<KeyValuePair<Range, T>> FindIntersection(int from, int to)
        {
            return this.Where(x => x.Key.IntersectWith(from, to));
        }
    }

public struct Range
    {
        public Range(int from, int to)
            : this()
        {
            From = from;
            To = to;
        }
        public int From { get; private set; }
        public int To { get; private set; }

public bool IntersectWith(int from, int to)
        {
            return this.From <= to && this.To >= from;
        }
    }
}

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Compilation time: 0,14 sec, absolute running time: 0,11 sec, cpu time: 0,11 sec, average memory usage: 19 Mb, average nr of threads: 4