public class GuestBookDataSource
    {
        private static CloudStorageAccount storageAccount;

        static GuestBookDataSource()
        {
            storageAccount = CloudStorageAccount.Parse(CloudConfigurationManager
                .GetSetting("marutiguestbookstorage_AzureStorageConnectionString"));

            CloudTableClient cloudTableClient = storageAccount.CreateCloudTableClient();
            CloudTable table = cloudTableClient.GetTableReference("GuestBookEntry");
            table.CreateIfNotExists();
        }

        public IEnumerable<GuestBookEntry> GetGuestBookEntries()
        {
            CloudTableClient tableClient = storageAccount.CreateCloudTableClient();
            CloudTable table = tableClient.GetTableReference("GuestBookEntry");

            TableQuery<GuestBookEntry> query = new TableQuery<GuestBookEntry>()
                .Where(TableQuery.GenerateFilterCondition("PartitionKey",
                QueryComparisons.Equal, DateTime.UtcNow.ToString("MMddyyyy")));

            return table.ExecuteQuery(query);
        }

        public void AddGuestBookEntry(GuestBookEntry newItem)
        {
            CloudTableClient tableClient = storageAccount.CreateCloudTableClient();
            TableOperation operation = TableOperation.Insert(newItem);
            CloudTable table = tableClient.GetTableReference("GuestBookEntry");
            table.Execute(operation);
        }

    }