using System;

using System.Collections.Generic;

using System.Xml;

using System.Data;

public class DataObject

{

    public string Name { get; set; }

}

​

public class Program

{

    public static void Main()

    {

        Queue();

    }

    public static void DataTable()

    {

        var dataTable = new DataTable();

        dataTable.Columns.Add("Name", typeof(string));

        for (int nLoop = 0; nLoop < 10000; nLoop++)

        {

            var dataObject = new DataObject();

            dataObject.Name = "Message number " + nLoop;

            dataTable.Rows.Add(dataObject);

            if (dataTable.Rows.Count  > 1000)

                dataTable.Rows.RemoveAt(0);

        }   

    }

    public static void Queue()

    {

        var queue = new Queue<DataObject>();

        for (int nLoop = 0; nLoop < 10000; nLoop++)

        {

            var dataObject = new DataObject();

            dataObject.Name = "Message number " + nLoop;

            queue.Enqueue(dataObject);

            if (queue.Count  > 1000)

                queue.Dequeue();

        }   

    }

}