private static List<CustomerEntity> GetEntitiesFromAzureTable(string tableName, TableQuery<CustomerEntity> query)
        {
            System.Diagnostics.Trace.TraceInformation(string.Format("Date = {0}, AzureTableOperation.GetEntitiesFromAzureTable is Called", DateTime.Now));
            // Retrieve the storage account from the connection string.
            CloudStorageAccount storageAccount = CloudStorageAccount.Parse(GetStorageConnectionString());

            // Create the table client.
            CloudTableClient tableClient = storageAccount.CreateCloudTableClient();

            // Create the CloudTable object that represents the "people" table.
            CloudTable table = tableClient.GetTableReference(tableName);

            IEnumerable<CustomerEntity> resultList = table.ExecuteQuery(query);

            if(resultList == null)
            {
                System.Diagnostics.Trace.TraceWarning(string.Format("Date = {0}, AzureTableOperation.GetEntitiesFromAzureTable return null result, query = ", DateTime.Now, query.ToString()));
                return null;
            }

            // Print the fields for each customer.
            foreach (CustomerEntity entity in resultList)
            {
                System.Diagnostics.Trace.TraceInformation(string.Format("{0}, {1}, {2}, {3}", entity.PartitionKey, entity.RowKey, entity.Email, entity.PhoneNumber));
            }

            List<CustomerEntity> responseList = new List<CustomerEntity>(resultList);

            return responseList;
        }