AJAX-enabling an ASP.NET website

using System;
using System.Collections.Generic;
using System.ComponentModel;

public static class BugManager
{
	// Do not modify this class.

	private static List<string> _users = new List<string>();
	private static List<Bug> _bugList = new List<Bug>();

	static BugManager()
	{
		InitializeUsernameList();
		InitializeData();
	}

	public static List<Bug> BugList
	{
		get { return _bugList; }
	}

	[DataObjectMethod(DataObjectMethodType.Select)]
	public static IEnumerable<Bug> GetBugsReportedByUser(string username)
	{
		if (string.IsNullOrEmpty(username))
			return BugList;

		return BugList.FindAll(
			delegate(Bug bug)
			{
				return bug.ReportedBy.StartsWith(username,
					StringComparison.OrdinalIgnoreCase);
			}
		);
	}

	private static void InitializeData()
	{
		_bugList.Clear();

		AddNewBug("Error occured when Submit button is clicked.",
			BugPriority.High, BugType.Bug, _users[0]);
		AddNewBug("Null reference exception occurred.",
			BugPriority.High, BugType.Bug, _users[1]);
		AddNewBug("File not found error occurred.",
			BugPriority.High, BugType.Bug, _users[2]);
		AddNewBug("Would like to see the ID when a new item is added.",
			BugPriority.Low, BugType.Enhancement, _users[3]);
		AddNewBug("Difficult to read yellow font on home page.",
			BugPriority.Medium, BugType.Trivial, _users[4]);
		AddNewBug("A sample bug description.",
			BugPriority.High, BugType.Bug, _users[5]);
		AddNewBug("Invalid cast exception occurred.",
			BugPriority.High, BugType.Bug, _users[0]);
		AddNewBug("Index array out of bounds error occurred.",
			BugPriority.High, BugType.Bug, _users[1]);
		AddNewBug("Unauthorized access error occurred.",
			BugPriority.Medium, BugType.Bug, _users[1]);
		AddNewBug("Insufficient memory error occurred.",
			BugPriority.High, BugType.Bug, _users[5]);
		AddNewBug("Page not found error occurred.",
			BugPriority.High, BugType.Bug, _users[5]);
		AddNewBug("Yet another sample bug description.",
			BugPriority.Medium, BugType.Bug, _users[3]);
		AddNewBug("Another sample bug description.",
			BugPriority.Low, BugType.Bug, _users[6]);
	}

	private static void AddNewBug(string bugDescription, BugPriority bugPriority,
		BugType bugType, string reportedBy)
	{
		_bugList.Add(new Bug(bugDescription, bugPriority, bugType, reportedBy));
	}

	private static void InitializeUsernameList()
	{
		_users.AddRange(new string[] { "Johnnie Walker", "John Doe", "Joe Bloggs", 
			"Luke Skywalker", "Erica Cartman", "Petra Salieri", "Erwin Wonderland"});
	}
}