Hello, great article, compact & clear. On my june CTP version, it didn't seem to work without the following change (maybe update the article ? )

DECLARE @conversationHandle UNIQUEIDENTIFIER

DECLARE @message NVARCHAR(100)

BEGIN

  BEGIN TRANSACTION;

  BEGIN DIALOG @conversationHandle

        FROM SERVICE Sender

        TO SERVICE 'Receiver'

        ON CONTRACT HelloContract WITH ENCRYPTION=OFF, LIFETIME= 600;

  -- Send a message on the conversation

  SET @message = N'Hello, World';

  SEND  ON CONVERSATION @conversationHandle

        MESSAGE TYPE HelloMessage (@message)

  COMMIT TRANSACTION

END

GO

regards,

steph