C#
using System;
using System.Collections;
using System.Collections.Generic;

public class DataHelper {
    private readonly List<string> FeedList;

    public DataHelper() {
        this.FeedList = new List<string>();
        
        this.FeedList.Add("ASP.NET");
        this.FeedList.Add("WinForms");
        this.FeedList.Add("WPF");
        this.FeedList.Add("SL");
        this.FeedList.Add("VCL");
    }

    public IEnumerable GetItems() {
        Random randomizer = new Random();
        List<KBInfo> kbItems = new List<KBInfo>();
        foreach (string name in FeedList) {
            kbItems.Add(new KBInfo() {
                PlatformName = name,
                Count = randomizer.Next(100, 500)
            });
        }
        return kbItems;
    }
}

public class KBInfo {
    public string PlatformName { get; set; }
    public int Count { get; set; }
}

Visual Basic
Imports Microsoft.VisualBasic
Imports System
Imports System.Collections
Imports System.Collections.Generic

Public Class DataHelper
    Private ReadOnly FeedList As List(Of String)

    Public Sub New()
        Me.FeedList = New List(Of String)()

        Me.FeedList.Add("ASP.NET")
        Me.FeedList.Add("WinForms")
        Me.FeedList.Add("WPF")
        Me.FeedList.Add("SL")
        Me.FeedList.Add("VCL")
    End Sub

    Public Function GetItems() As IEnumerable
        Dim randomizer As New Random()
        Dim kbItems As New List(Of KBInfo)()
        For Each name As String In FeedList
            kbItems.Add(New KBInfo() With {.PlatformName = name, .Count = randomizer.Next(100, 500)})
        Next name
        Return kbItems
    End Function
End Class

Public Class KBInfo
    Private privatePlatformName As String
    Public Property PlatformName() As String
        Get
            Return privatePlatformName
        End Get
        Set(ByVal value As String)
            privatePlatformName = value
        End Set
    End Property
    Private privateCount As Integer
    Public Property Count() As Integer
        Get
            Return privateCount
        End Get
        Set(ByVal value As Integer)
            privateCount = value
        End Set
    End Property
End Class

C#
using System;
using System.Collections;
using System.Web.Script.Serialization;

public partial class _Default : System.Web.UI.Page {
    protected void Page_Load(object sender, EventArgs e) {
        RegisterScriptObjectFromDataObject(GetDataObject());
    }
    private IEnumerable GetDataObject() {
        return new DataHelper().GetItems();
    }
    private void RegisterScriptObjectFromDataObject(IEnumerable dataObject) {
        JavaScriptSerializer serializer = new JavaScriptSerializer();
        string jsonData = serializer.Serialize(dataObject);

        ClientScript.RegisterStartupScript(this.GetType(), "ANY_KEY", string.Format("var chartData = {0};", jsonData), true);
    }
}

Visual Basic
Imports Microsoft.VisualBasic
Imports System
Imports System.Collections
Imports System.Web.Script.Serialization

Partial Public Class _Default
    Inherits System.Web.UI.Page
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
        RegisterScriptObjectFromDataObject(GetDataObject())
    End Sub
    Private Function GetDataObject() As IEnumerable
        Return New DataHelper().GetItems()
    End Function
    Private Sub RegisterScriptObjectFromDataObject(ByVal dataObject As IEnumerable)
        Dim serializer As New JavaScriptSerializer()
        Dim jsonData As String = serializer.Serialize(dataObject)

        ClientScript.RegisterStartupScript(Me.GetType(), "ANY_KEY", String.Format("var chartData = {0};", jsonData), True)
    End Sub
End Class