TeamRepository and Models for a demo project.

TeamRepository.cs

using System;
using System.Collections.Generic;
using System.Linq;

/// <summary>
/// Team information
/// </summary>
public class Team
{
    public int Id { get; set; }
    public string Name { get; set; }
    public string Description { get; set; }
    public string Captain { get; set; }
    public List<string> MemberNames { get; set; }

    public Team()
    {
        MemberNames = new List<string>();
    }
}

/// <summary>
/// A base repository class that has some very rudimentary thread safety.
/// (I know it's not a "real" repository, just relax bro)
/// </summary>
public class ListRepository<TItem>
    where TItem : class
{
    object itemLock = new object();
    protected List<TItem> Items = new List<TItem>();

    /// <summary>
    /// Returns the first item matching the filter.
    /// </summary>
    public TItem First(Predicate<TItem> filter)
    {
        TItem result;
        lock (itemLock)
        {
            result = Items.FirstOrDefault(item => filter(item));
        }
        return result;
    }

    /// <summary>
    /// Returns all items matching the filter.
    /// </summary>
    public IEnumerable<TItem> Where(Predicate<TItem> filter)
    {
        IEnumerable<TItem> result;
        lock (itemLock)
        {
            result = Items.Where(item => filter(item)).ToList();
        }
        return result;
    }

    /// <summary>
    /// Removes all items matching the specified filter.
    /// </summary>
    public void Remove(Predicate<TItem> filter)
    {
        lock (itemLock)
        {
            var toRemove = Items.Where(item => filter(item)).ToList();
            foreach (var item in toRemove)
            {
                Items.Remove(item);
            }
        }
    }

    /// <summary>
    /// Adds a new item.
    /// </summary>
    public void Add(TItem newItem)
    {
        lock (itemLock)
        {
            Items.Add(newItem);
        }
    }
}

/// <summary>
/// Teams Data
/// </summary>
public class TeamRepository : ListRepository<Team>
{
    public TeamRepository()
    {
        Items = new List<Team>
        {
            new Team
            {
                Id = 1,
                Name = "Jaya Win Jive",
                Description = "Learning Windows Mobile",
                Captain = "ravware",
                MemberNames = new List<string>() { "ravware", "jayasingh" }
            },
            new Team
            {
                Id = 2,
                Name = "Teem",
                Description = "I hear they're giving out free Windows Phone 7s at this event! *chuckle*",
                Captain = "DawsonToth",
                MemberNames = new List<string>() { "DawsonToth", }
            },
            new Team
            {
                Id = 3,
                Name = "FVCP",
                Description = "Fueled by gin. Greg would like to call us the Freezer Weazles...too late.",
                Captain = "Michalsen",
                MemberNames = new List<string>() { "Michalsen" }
            },
            new Team
            {
                Id = 4,
                Name = "devmke",
                Description = "Milwaukee Developers",
                Captain = "brennanMKE",
                MemberNames = new List<string>() { "brennanMKE" }
            },
            new Team
            {
                Id = 5,
                Name = "anotherTeam",
                Description = "anotherTeam",
                Captain = "gordana",
                MemberNames = new List<string>() { "gordana" }
            },
            new Team
            {
                Id = 6,
                Name = "Triton Phone Phreaks",
                Description = "Think Better",
                Captain = "Dave Arlin",
                MemberNames = new List<string>() { "matthidinger", "sumeet", "Akshat", "Dave Arlin" }
            },
            new Team
            {
                Id = 7,
                Name = "mPOP",
                Description = "nom nom nom",
                Captain = "nishanthsamala",
                MemberNames = new List<string>() { "pricexperience", "nishanthsamala" }
            },
            new Team
            {
                Id = 8,
                Name = "Packer Hackers",
                Description = "A husband and wife team.",
                Captain = "thejeanious",
                MemberNames = new List<string>() { "thejeanious", "scott.seely" }
            },
        };
    }
}