use Linq-to-Objects to query against .NET collections using the LINQ syntax : LINQ « ADO.net Database « ASP.NET Tutorial

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" 
    Inherits="Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Linq-to-Objects</title>
</head>
<body>
    <div id="pageContent">
        <form id="form2" runat="server">
            <asp:Button ID="Button1" runat="server" Text="Click" onclick="Button1_Click" />
        </form>
    </div>
</body>
</html>

File: Default.aspx.cs

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Xml.Linq;

public partial class Default : System.Web.UI.Page
{
    protected void Button1_Click(object sender, EventArgs e)
    {
        int[] fiboNumbers = new int[] { 0, 1, 1, 2, 3, 5, 8, 13, 21, 34 };
        var data0 = from n in fiboNumbers
                   where n % 2 == 0
                   select n;

        Response.Write(data0.Count());
        Response.Write("<hr/>");

        var data1 = (from n in fiboNumbers
                    where n % 2 == 0 && n <10
                    select n).Sum();

        Response.Write(data1);
    }
}

18.50.LINQ
	18.50.1.	use Linq-to-Objects to query against .NET collections using the LINQ syntax
	18.50.2.	Use Linq-to-DataSets to query against (typed) DataTables and DataSets using the LINQ syntax
	18.50.3.	A grid with an empty data source.