Example of a cached repository.

CachedRepository.cs

/// <summary>
/// Provides a cached repository of the DM lists
/// </summary>
internal class CachedRepository
{
    private readonly ObjectCache cache = MemoryCache.Default;
    private const string CacheName = "DM.Lists";
    private const int ExpiryMinutes = 1;

    public List<DMList> GetLists()
    {
        var data = cache[CacheName] as List<DMList>;
        if (data != null)
            return data;

        try
        {
            var client = new DMListManagerSoapClient();
            data = client.GetLists(AuthenticateManager.GodToken, 0, null).ToList();
        }
        catch (Exception ex)
        {
            throw new Exception("Failed to get lists or fields", ex);
        }

        var expiryDate = DateTime.Now.AddMinutes(ExpiryMinutes);
        cache.Set(CacheName, data, expiryDate);

        return data;
    }
}