using System;

using System.Collections.Generic;

using System.Linq;

​

public class SettingRules

{

    public int From { get; set; }

    public int To { get; set; }

}

​

public class Program

{

    public static void Main()

    {

        List<SettingRules> settingRulesList = new List<SettingRules>

        {

            new SettingRules { From = 1, To = 5 },

            new SettingRules { From = 3, To = 5 },

            new SettingRules { From = 5, To = 5 },

            new SettingRules { From = 6, To = 10 },

            new SettingRules { From = 11, To = 15 },

            new SettingRules { From = 3, To = 7 }

        };

​

        SettingRules sr = new SettingRules { From = 1, To = 5 };

​

        List<SettingRules> matchingPeriods = new List<SettingRules>();

​

        for (int x = sr.From; x <= sr.To; x++)

        {

            foreach (SettingRules rule in settingRulesList.Where(rule => x >= rule.From && x <= rule.To))

            {

                //if ((x >= rule.From && x <= rule.To) || (x == rule.From && x == rule.To))

                //{

                    //Console.WriteLine(rule.From + "-" + rule.To);

                    if (!matchingPeriods.Contains(rule))

                    {

                        matchingPeriods.Add(rule);

                        Console.WriteLine(rule.From + " - " + rule.To);

                    }

                //}

            }

        }

​

        //Console.WriteLine("Matching Periods for sr (1-5):");

        //foreach (SettingRules period in matchingPeriods)

        //{

        //    Console.WriteLine(period.From + " - " + period.To);

        //}

    }

}