using System;

using System.Collections.Generic;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        List<CustomData> myList = new List<CustomData>();

        myList.Add(new CustomData()

        {Branch = "Branch 1", ItemName = "Misal", Quantity = 150});

        myList.Add(new CustomData()

        {Branch = "Branch 1", ItemName = "Wada", Quantity = 100});

        myList.Add(new CustomData()

        {Branch = "Branch 2", ItemName = "Misal", Quantity = 160});

        myList.Add(new CustomData()

        {Branch = "Branch 2", ItemName = "Wada", Quantity = 210});

        Print(myList);

        var result = myList.GroupBy(x => x.Branch).Select(y => new

        {

            Branch = y.Key, 

            FirstPeriod = y.Count(z => z.Quantity > 100 && z.Quantity <= 150), 

            SecondPeriod = y.Count(z => z.Quantity > 150 && z.Quantity <= 200), 

            ThirdPeriod = y.Count(z => z.Quantity > 200 && z.Quantity <= 250)

        }).ToList();

        Print(result);

    }

​

    public static void Print<T>(IEnumerable<T> items)

    {

        var props = typeof (T).GetProperties();

        foreach (var prop in props)

        {

            Console.WriteLine("{0}\t", prop.Name);

        }

​

        Console.WriteLine();

        foreach (var item in items)

        {

            foreach (var prop in props)

            {

                Console.WriteLine("{0}\t", prop.GetValue(item, null));

            }

​

            Console.WriteLine();

        }

    }

}

​

public class CustomData

{

    public string Branch

    {

        get;

        set;

    }

​

    public string ItemName

    {

        get;

        set;

    }

​

    public int Quantity

    {

        get;

        set;

    }

}