All posts by : Thinktecture Blog

51 of 102 | WCF server startup slow on W2K3 in VM - Just a quick and unrelated tip: If you - like I'm doing it right now - run a WCF server in a Virtual Machine running W2K3 Server and your VM is supposed to be standalone and not part of domain you might experience a delay when a WCF server application is starting. When looking at the issue with Wireshark/Ethereal (yes, I do what I preach and a Network Sniffer really is one of the first things I use when I experience some kind of unexpected delay ;-)) I noticed that the machine is broadcasting eight Netbios name service queries on its internal subnet to find a domain controller. These queries time out after about eight seconds, but I really didn't want to wait that long.I'm sure that there a......

52 of 102 | Coming to Brussels on September 25 - As David has already blogged, I will be back in Brussels on September 25. I think that's great as I really like the city and wasn't able to make it to the last DevDays there. Microsoft is hosting (for free!) a full day on .NET Framework 3.0 in which Peter Himschoot will present on Windows Presentation Foundation and CardSpace, and I'll focus on Windows Communication Foundation and Workflow Foundation. It's going to be fun. (And: You can still vote for the session contents!) ...

53 of 102 | WCF, IIS7, WAS and Vista - really - Great information over at the IIS7 web site. If you want to know which IIS7 feature will be supported in which Vista version, they have an overview. If you want to know how to exactly and step-by-step install and configure IIS7 on Vista, they show you. And finally, if you really wanna know about the marriage of WCF, WAS and IIS7, go ahead and read this thorough whitepaper. Good stuff. ...

54 of 102 | Flexible notifications with WCF duplex communication in your application architecture - OK, this does not happen too often, but I am copying here part of a thread and especially my answer from the MSDN WCF forums. Without further ado, let's go... ------- Hello All, I'm looking for some design guidance about WCF. I want to build an application where my business objects live in one process (the server). I want to be able to attach arbitrary UI’s (or interested parties) to this process to display information about the business objects, as well as manipulate them. These UI’s could live on the same machine, or on other machines. I would like provide a uniform interface to these UI’s regardless of where they live (same machine or other machines). It seems like this is an ideal circu......

55 of 102 | Sie wollen WinFX, uups: .NET Framework 3.0, lernen und im Einsatz sehen? - Kein Problem.thinktecture und newtelligence bieten das TornadoCamp WinFX an. Was soll ich sagen? Das Who-Is-Who in den prominenten Bereichen von .NET Framework 3.0 im deutschsprachigen Raum steht Ihnen eine ganze Woche lang zur Verfügung. 16.-20.10.2006: TornadoCamp WinFX .NET Framework 3.0 durch und durch Windows Communication Foundation (WCF), Windows Presentation Foundation (WPF) und Windows Workflow Foundation (WWF) sind die wesentlichen neuen Betandteile des .NET Frameworks 3.0 (vormals bekannt als WinFX). Diese neuen APIs – zusammen mit Windows CardSpace (aka InfoCard) - wurden bislang unter dem Codenamen WinFX zusammengefasst. Die Basis des .NET Frameworks erfährt mit der neue......

56 of 102 | WCF duplex communication with unique client-side callback addresses - When doing duplex communication in WCF - e.g. using the wsDualHttpBinding - the WCF runtime automatically sets up a callback address for the calling application to listen on based on a value provided in a binding configuration. This is a unique address, unique per machine. If you want to run several client applications (and if it is just for testing purposes) it is necessary to have a really unique client-side callback address per application instance. And uniqueness cries for GUIDs. Following is an app.config for the client together with a code snippet to set up up application instance-specific callback addresses.   <configuration>  <system.serviceModel>   <cl......

57 of 102 | MSDN WebCast: 'Dissecting Contract-First Web Services' Post-Mortem - If you are interested in the slides from my MSDN US webcast on Contract-First Web Services, go ahead and grab them. Please feel free to get in touch with me if you have any questions. See you in the next webcast. ...

58 of 102 | MSDN WebCast: 'Transactions in Distributed Solutions with Windows Communication Foundation' Post-Mortem - First of all, I want to thank everybody attending my MSDN US webcast on designing and dimplementing transactions in distributed solutions with WCF. It was a lot of fun and according to the scores it also semmed to be successful ;) I have uploaded both the slides and the demos for this webcast. Please feel free to get in touch with me if you have any questions. See you in the next webcast. ...

59 of 102 | Exposing metadata from WCF services - As some of you may already have figured out, there have been a few breaking chnages in WCF's RC1 OM which is currently being distributed with the June CTP of .NET Fx 3.0. One point of confusion: Metadata publishing is no longer enabled by default for WCF services. You must now explicitly configure metadata endpoints for your service by adding the ServiceMetadataBehavior (from System.ServiceModel.Description namespace) to your service and adding a IMetadataExchange-based endpoint using the standard mechanisms for adding endpoints to a WCF service. The metadataPublishing behavior configuration section has been renamed to serviceMetadata accordingly. Also, the enableGetWsdl configuration ......

60 of 102 | Hosting WCF services in COM+ (for container's sake) - Today a customer talked to me about the various options of hosting WCF services. He actually knew quite a bit already, that it is possible to use literally any kind of managed process: a console app, a WinForms app, an NT Service, and of course also the very popular way to leverage IIS and ASP.NET. Then he threw in the new world of Vista and Longhorn. He already heard about WAS - well, he was ( ;) ) a bit confused and thought WAS will be the replacement for IIS in the case of non-HTTP transports. Well, not likely. I told him that the 'A' in 'WAS' is the important part. It looks like I cannot cover all the cool things that WCF does internally to ensure a maximum of performance and scalabilit......

61 of 102 | WCF service host base addresses - Finally, starting from RC1 (currently being distributed with the June CTP of .NET Fx 3.0 )we can finally specify base addresses in config for our WCF services. Small sample config to achieve this: <configuration>  <system.serviceModel>     <services>       <service name="Service.TecTvService"                behaviorConfiguration="metadataBehavior">         <host>           <baseAddresses>            ......

62 of 102 | Shaping data for the DataContractSerializer (and thus WCF) - The other day we came across this small thing while writing some sample code for our docs. We can control the way our CLR arrays are serialized in a well-known way by using XmlSerializer and the XmlArrayAttribute and XmlArrayItemAttribute attributes.For example having a type like this... [XmlType(TypeName="Family")]public class Family {   [XmlArray(ElementName = "Members")]   [XmlArrayItem(ElementName = "Name")]   public string[] Members; } ...could produce XML as follows by leveraging XmlSerializer. <Family xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">   <Members>     <Nam......

63 of 102 | WinFX renamed to .NET Framework 3.0 - WinFX has been renamed to .NET Framework 3.0! .NET Framework 3.0 includes Windows Presentation Foundation (WPF) Windows Communication Foundation (WCF) Windows Workflow Foundation (WF) Windows CardSpace (WCS) (previously known as InfoCard) .NET Framework 3.0 is still based on CLR 2.0. The name change does not include any technical changes, it just should clear up the confusion between WinFX and .NET. Somasegar has more detailed information! Christian...

64 of 102 | Beispiel für WCF Talk bei der Usergroup Frankfurt am Main - Für alle, die gestern in meinem Vortrag bei der Usergroup Frankfurt/Main in Bad Homburg dabei waren: wer an dem vorgestellten (und teilweise live codierten) Sample interessiert ist, möge sich doch bitte bei mir per Kontaktformular melden. Danke! ...

65 of 102 | Explaining WCF - in a slightly different way - Seems like Clemens likes the dotnetpro.tv video episode that Ralf and myself shooted the other day about Windows Communication Foundation.Only available in German, though......

66 of 102 | Explaining WCF - in a slightly different way (in German) - Seems like Clemens likes the dotnetpro.tv video episode that Ralf and myself shooted the other day about Windows Communication Foundation. Only available in German, though... ...

67 of 102 | IXmlSerializable rules - Yesterday a customer got in touch with me regarding some custom serialization/deserialization issues in his ASMX-based Web Services. When using IXmlSerializable there are essentially three 'rules' to follow: In WriteXmlDon't ever write the root element, but have it specified as XmlRoot. The XmlSerializer instance will create the root element (or SOAP body will replace the root with whatever name it bears) In ReadXmlPretend the root is always there On schema importsAvoid the duplicate global element problem: check to make sure that the schema isn't already in the SchemaSet if(!schemaSet.Contains(mySchema.Id)) { schemaSet.Imports.Add(mySchema); } Nothing spec......

68 of 102 | jWSCF im deutschen Eclipse Magazin - Im der aktuellen Ausgabe des Eclipse Magazins gibt es einen Artikel über jWSCF. jWSCF bedient sich über einen COM Interop Layer des WSDL Wizards von WSCF. ...

69 of 102 | Now it gets ridiculous - SOA 2.0 - http://www.infoworld.com/article/06/05/17/78420_HNsoa20_1.html ...

70 of 102 | More LINQ - Scott Guthrie has some great information on using LINQ with ASP.NET. Also, here are links to my LINQ series: LINQ Part 1 - Filtering and Sorting Object Lists LINQ Part 2 - Filtering and Sorting Data from the Database LINQ Part 3 - Filtering and Sorting XML LINQ Part 4 - What's behind a query expression? LINQ Part 5 - Custom extension methods more to follow Christian...

71 of 102 | WCF Extensibility Cornucopia - show it all in one - WCF is extensible, very extensible. If you need a feature which is not in V1 (and obviously there is quite a lot of 'missing', as it is a V1), go and write your custom code and hook it in. Or if you need a feature which is not really the responsibility of WCF as a platform but rather is part of your business, go and write the code, chose the appropriate interface and hook it in. My friend Ralph posted a complete code listing with all available major WCF extensibility points at the Service Model layer. Helping him out I moved it to the Feb CTP and also created a VS 2005 solution for your convenience to test this stuff. There are a number of extension hooks: // Custom client extension. /......

72 of 102 | LINQ vs. XQuery - What's the difference between XQuery and LINQ?...(read more)...

73 of 102 | Service Factory, aka Web Service Software Factory, nee Service BAT - Some days ago I already hinted at it - now it is more or less official. Also Beat, Edward, Matias, Jason and others already blogged about it. I am part of the 'Service Factory' advisory board and we think that this may evolve into something really useful - we will see, we still have a looong way to go ;) What is now available to download is really just a very early snapshot of our thoughts and work. The Service Factory is a cohesive collection of various forms of guidance that have been build with the primary goal of helping you build high quality connected solutions in a more consistent way with less effort. In addition to the forms of guidance you may have already seen from the patterns &......

74 of 102 | Meta, meta, metadata: No need for a config file with WCF endpoint definitions that can easily get out-of-sync - OK, looks I like long blog post titles these days... There is a nice feature implemented in WCF which I want to call dynamic endpoint negotiation. This feature uses WS-MetadataExchange under the hood and is quite easy to implement on the consumer side. You may want to use this feature e.g. if you do not want to rely on WCF endpoint configurations sitting either in your code or in a configuration file. For this you can walk up to a service's base address which by default exposes a ?wsdl and /mex address to retrieve metadata (yes, both can be disabled with a behavior setting). So the following line gets the metadata from a service and gives us back a list of all endpoints - 'all' means a......

75 of 102 | Guidance-based design and implementation of distributed solutions adhering to service-oriented thoughts with WCF inside of your favorite development IDE - I think the title says it all (really? :)) - stay tuned for more to come in the next few days, as my friend Jason already hinted at. And it may be related to this and this and this and even this and ... hm, maybe even dreaming about a future relation with this...  ...

76 of 102 | cordbg fun - Debugging is an interesting topic which should be covered in more detail than just a blog post. However, I had to play ‘n figure-out something strange in one of the .NET Fx assemblies ;-). I used some cool tricks and thought about sharing them here. BTW: I spend a good part of my life with Reflector. But sometimes it’s very hard to track each and every function call and study the code until you get to where you wanna go (Sometimes I just do this for hours and hours for fun though ;-). Specially, reading through the SOAP stack (WCF) is one of my hobbies!!!). Today I had a managed program which did not crash at all but did not provide the expected results. And that was just an optimized rel......

77 of 102 | Debugging WF-based workflows hosted in ASP.NET - OK, I have been banging my head several times to get this working. Now here it is your reference. Here are the steps to debug a WF-based workflow hosted in ASP.NET. Enable debugging for your ASP.NET application by setting 'debug=true' in the web.config Set the workflow library as the startup project and set appropriate breakpoints on the workflow In the workflow project's properties dialog select the 'Debug' tab and choose 'Start with external URL'. Enter the URL of your default webpage here Now attach to w3wp.exe (on Server 2003, Vista), aspnet_wp.exe (on XP) or webdev.webserver (when using Cassini-like dev and test web server from Visual Studio 2005) in which the......

78 of 102 | LINQ Part 3 - Filtering and Sorting XML - LINQ part 3 shows filtering and sorting XML data using XLINQ and XSLT....(read more)...

79 of 102 | LINQ Part 1 - Filtering & Sorting Object Lists - Today accessing object lists, databases, and XML requires a different syntax for every of these technologies. LINQ (Language Integrated Query) makes it possible to use the same syntax accessing all of these technologies. In this and some follow-on blog entries I'm showing how LINQ can be used to access object lists, databases, and XML. With the sample application I have a list of racers List<Racer>. The Racer class is a very simple class that contains the name of the racer and the number of wins. With the result I just want the racers who have won more than three races, and the result should be sorted by the number of wins. The traditional way (using .NET 2.0) to filter objects fro......

80 of 102 | Italian version of Professional C# 2005 - I've just received a copy of my book Professional C# 2005 in Italian language:   C# 2005 Guida per lo sviluppatore http://www.hoepli.it/item.asp?ty=&id=172326&pc=000015003002002   All the chapters: L'architettura .NET Le basi del C# Oggetti e tipi Ereditarietà Operatori e cast Delegate ed eventi Gestione della memoria e puntatori Stringhe ed espressioni regolari Collezioni I generici Reflection Errori ed eccezioni Threading Visual Studio 2005 Gli assembly Sicurezza in .NET Localizzazione Distribuzione Accesso ai dati con .NET Programmare .NET con SQL Server 2005 Utillizzare XML Lavorare con Active Directory Windows Forms I dati in .NET ......

81 of 102 | WSCF 0.6 goes live!!! - Christian says WSCF 0.6!!!  Yes! We are not kidding! Go and grab it out! Also don’t forget to participate our cool thinktecture contest this time ;-) A big kiss goes out to numerous people (angle bracket loving geeks) who made this announcement true. Thanks a million and well-done guys! Keep your problems, comments, flames, rants rolling in at our forums. Cheers...

82 of 102 | [RELEASE] WSCF 0.6 for Visual Studio 2005 & .NET Framework 2.0 - We are finally announcing the release of WSCF 0.6. This version is only available to work with .NET Framework 2.0 and Visual Studio 2005. Of course WSCF is still free and nobody has to pay anything.   WSCF 0.6: http://www.thinktecture.com/Resources/Software/WSContractFirst/default.html   New Features: http://www.thinktecture.com/Resources/Software/WSContractFirst/features06.html   Fixes from 0.51: http://www.thinktecture.com/Resources/Software/WSContractFirst/fixes06.html   Discussions/Feedback: http://forums.thinktecture.com/default.aspx?ForumGroupID=4   Thanks a lot for everybody's help and support over the years. It is invaluable. ...

83 of 102 | Why does the world need WS-ReliableMessaging? - In the last few months I have given a number of presentaions on WCF and had countless customer meetings. One of the most frequently asked question was why in the world we would need WS-ReliableMessaging (WS-RM). I think I had a good explanation, but now the infamous Shy Cohen posted a very nice and easy to understand answer to the MSDN WCF Forums. The only real problem I currently have with the WS-RM implementation in WCF is that they do not have a durable store for the WS-RM messages. It is all in-memory and AppDomain-based. Tomas also thinks that this might become a problem in one or the other scenarios. ...

84 of 102 | WCF channels, proxies, and addresses - The actual reply endpoint address for the service that receives the request message is embedded in a message header. Yes, a default address may already be defined in the configuration of the endpoint, but in our case it changes at runtime. There is one queue for the incoming messages to be processed by the service - and another queue for the service to send back e.g. status or report messages from which the client can get updates on where the service-side processing is at. If I create a proxy like this:  ChannelFactory fac =    new ChannelFactory("MsmqClient");  IOrderStatus proxy = fac.CreateChannel(); The return endpoint address where to send the reply messages is hidden in a mes......

85 of 102 | Why the heck should a WCF developer care about Vista - People keep asking me: now that WinFX and therefore WCF is available for all major platofrms like Windows XP SP2, Windows Server 2003 SP1 and Windows Vista (and of course for Windows Codename `Longhorn Server`), why the heck should I as a developer (or my project for that matter) move away from my existing and mature platforms on to Vista Isn`t it all the same for me as a WCF guy Short answer: No. Long answer: ... There are quite a few features that are not available on the so called `down level` platforms ;) These are the ones that come to mind mind. Please feel free to comment on any other additional ones! Maybe the major feature for WCF apps on Vista is the Windows Activation Service (......

86 of 102 | What you should know about service contracts - We at thinktecture are proud to unveil some of the internal conversations as we have a strong belief that they are going to help you when designing and implementing your systems. So here is the second attempt. The first one was published a couple of months ago but it was in German language ;-). Whilst proudly announcing this I would like to express my view of one of the interesting points discussed here. As a believer of SOA, I really like to decouple service implementation from the internal implementation(s) (Remember, I totally agree with the decision tree and I`m only talking about the extreme case here ;-)). Thus I would like to consider the service layer as a message transforming lay......

87 of 102 | Latency vs. Bandwidth Developers vs. Einstein - One piece of The Ultimate Wisdom which is quoted quite often is that "chatty interfaces kill the performance of a distributed application". But actually, it`s not the chatty interface which kills it - the really limiting factor is instead one of the handful of unchallenged physical constants of this universe: the speed of light. But let me come back to this later. Whenever something - and this can be something non-physical like a stream of bytes or a huge chunk of extremely physical rocks - needs to move, you can choose between a set of different alternatives in the way you transport it: You can transfer as much as possible in one go, or alternatively, you could take multiple round trips w......

88 of 102 | "Abgemacht: Windows Communication Foundation, ehemals Indigo" - mein dotnetpro-Artikel als PDF - Ich habe gerade durch "Zufall" entdeckt, dass mein aktueller dotnetpro-Artikel zur Windows Communication Foundation (WCF, aka Indigo) auch online kostenlos fr alle zur Verfgung steht. Alles auf Basis von WCF Beta 1. ...

89 of 102 | WS-* support on the .NET platform - UPDATE: I added ASMX 1.x to the table. As I am currently investigating into some interoperability scenarios between the .NET and Java worlds I thought you may be interested in a list of supported WS-* specifications for .NET today and tomorrow. Only out-of-the-box features and support is mentioned. I hope that there are no mistakes in this table... Category Protocol / Technology ASMX 1.x ASMX 2.0 WSE 2.0 WSE 3.0 WCF Core Basic Profile 1.1 X** X X X X   SOAP 1.1 X X X X X   SOAP 1.2 - X  - X X   WS-Addressing - ......

90 of 102 | Notched up the MVP award (Windows Server System XML Web Services) - I just received the confirmation email from SEA MVP Lead. Thank you Microsoft. :-) Update: I really enjoyed the following welcome note from our friend William. I just could not resist my self from posting it here ;-). "Someone who is on-board that loves to pay the tax" Cheers ...

91 of 102 | One new MVP at Thinktecture! - My friend and colleague Buddhike de Silva got the MVP award! He is MVP for the Windows Server System - XML Web Services! Congratulations! Christian...

92 of 102 | 6 new MCADs and 9 new MCPs - This summer I`ve given a .NET training for a group of 6 developers (picture) and software architects from EDS. After the training, all of the course attendees reached the MCAD certification. Now I`m running the same training for a second group from EDS with 9 developers. Monday and Tuesday were the dates for their first .NET exams on their way to MCAD: Developing and Implementing Web Applications with Microsoft Visual Basic .NET and Microsoft Visual C#. 9 of 9 succeeded with the exam! We have nine new MCP`s! The multi-week course is a course to learn Visual Basic and C#, core features of the .NET Framework, Web Forms with ASP.NET, Windows Forms, Web Services and .NET Enterprise Services. Th......

93 of 102 | Office 12 - Office 12 was one of the products that was demonstrated at Bill Gates PDC keynote. When users have been asked about the features they would like to have in the new Office version, 9 out of 10 users asked for features that are already available. So the UI needs a change! The ribbon - no more menus (except the File menu). Instead, there are tabs. With every tab different controls show up depending on the context. The user interface is highly customizable with XML and managed code. More XML: XML is deeply integrated into Office 12. While Office 2003 supports XML (see Creating Word documents with XML part 1 and part 2, and Getting data from Excel 2003), now the default file format is XML. A do......

94 of 102 | VSTA - Have you been looking for VSA the Some years ago VSA (Visual Studio for Applications) was announced as a replacement for VBA, for including in custom applications. Lately it has been quiet about VSA. There`s a good reason: VSTA - Visual Studio Tools for Applications. VSTA makes it simple to customize applications. The Wednesday keynote at PDC included a AutoCAD demonstration. AutoCAD has the VSTA IDE embedded to provider customization. Starting Visual Studio from within AutoCAD creates a project and offers helper classes. From here the .NET Framework is available to invoke Web services, get to other data.... Christian...

95 of 102 | Windows Workflow Foundation - Did you miss something like activity diagrams with Visual Studio Visual Studio 2005 includes some cool designers such as a class designer, application designer, system designer... There`s a good reason an activity diagram is missing. A diagram that can be compared is coming with Windows Workflow Foundation (WWF). WWF is a .NET class library that includes support for both system and human workflow. Of course the designer doesn`t look like UML activity diagrams, as here code gets generated. In the Wednesday keynote at PDC it was shown to define a breakpoint in the designer. From therer it is possible to step into the code. Cool! Office 12 and the next version of BizTalk server are using WWF t......

96 of 102 | Microsoft Max - At PDC keynote Microsoft Max was shown. Jim Allchin asked a team of six developers to create a sample application using WinFX. The result is Microsoft Max, a cool picture sharing application! This application makes use of WCF for peer-to-peer communication, and WPF for the user interface with some three-dimensional features showing the pictures. Team blog for Microsoft Max Microsoft Max Homepage including the download! Christian...

97 of 102 | WinFX Namespaces - Yesterday evening I arrived in Los Angeles (some hourse later than expected because of a cancelled flight). Sunday morning I checked in at PDC. In the bag there`s an interesting poster about the major namespaces of WinFX. Here I`m skipping the namespaces known from 1.0 to only list the 2.0, 3.0 and Future namespaces. Fundamentals System.Transactions (2.0) System.Collections.Generic (2.0) System.Security.AccessControl (2.0) Managed Add-in Framework System.AddIns (Future) Contract Microsoft.Build (2.0) System.Runtime ConstrainedExecution (2.0) ClickOnce Deployment System.Deployment (2.0) Presentation System.Windows (3.0) Annotations, Automation, Controls, Data, Documents, Ink......

98 of 102 | Thinktecture Talks - Bei Thinktecture gibt es jetzt Thinktecture-Gesprche! Das erste Gesprch ist zwischen Ralf Westphal und Christian Weyer, dabei werden u.a. diese Fragen beantwortet: Welchen Wert hat .NET Remoting, sobald es Windows Communication Foundation gibt Ersetzt WCF .NET RemotingWas wird aus COM+, d.h. dem Application Server von Windows Wird er berflssig, weil ich ja jetzt ganz einfach aus einer Consolen-Anwendung einen WCF-Host machen kann Christian...

99 of 102 | "Ja - halooo erstmal...": .NET User Group-Vortrag in Paderborn über Windows Communication Foundation (aka Indigo) - Nein, nein, ich mchte mich nicht mit diesem berhmten Brger der Stadt Paderborn anlegen oder gar vergleichen aber ich wrde mich sehr freuen, viele Teilnehmer beim .NET Usergroup-Treffen am 5.9.2005 begren zu drfen. Thema: "Entwicklung verteilter Anwendungen mit WCF (aka Indigo): mehr als nur Web Services++" Und wie immer der Dank an INETA Christian und Damir....

100 of 102 | Cinema Tickets von Microsoft - Im Jahr 2003 gab`s ein Kino-Ticket von Microsoft durch das Schreiben eines Web service clients. Damals war`s Matrix Revolutions, das Ticket war ein Code in einer Email.  Zwei Jahre nach diesem Event gibt`s wieder eine Kinokarte von Microsoft. Diesemal gibt`s die Karte einfach durch Registrierung bei MSDN Connection Austria. Die ersten 500 bekommen eine Karte zu diesem Film. Ich bin nicht ganz sicher ob der auch so cool wie Matrix Revolutions ist ;-) - aber wir werden`s sehen.... Die richtige Challenge kommt nach diesem Film: da startet ein Coding Contest. Tips fr den Coding Contest gibt`s nicht nur bei MSDN Connection Austria, sondern auch bei usergroups.at! Mehr Infos von Mario! Chri......