The following is a rapid-fire description of channels, where they come from, and a code sample to illustrate: Channels are one of the more complex parts of a WCF application. For those that are new to WCF, a channel is a sink or a source of a message, and they are largely hidden from the purview of the application developer. In fact, it is ...

It has been a while since I have blogged - my apologies. Life has been hectic. One of the ''not so fun'' parts of writing a book on a beta technology like WCF is the constant movement of the API (not to mention changing the ship vehicle). One change in the June CTP (appears to persist in the July CTP as well) that caught my attention is the ...

What we have come to know and love as WinFx is now called the .NET Framework 3.0 (see http://www.eweek.com/article2/0,1895,1974865,00.asp). It doesn' t look like this is anything more than a branding stunt, but I now have to go back and change parts of my book :)

Last week I presented an MSDN webcast titled ''The Lifetime of a WCF Message''. As promised, the demo code shown is here: LifeOfAMessage.zip ( KB) A couple of things to remember about the source: It was built with the WinFx Feb CTP, but should upgrade to Beta 2 with no problem :) Demos 1 and 2: set WCFReceiver101 and WCFSender101 as ...

WCF is all about sending and receiving messages. There are many settings that have an impact on how a WCF application will scale. The following describes how the settings for instancing modes and concurrency mode impact the scalability of a WCF receiving application, and when they make thread synchronization necessary in your code. Instancing ...

I spoke briefly at Devscovery NYC tonight about WCF and WS-ReliableMessaging. As promised, the code is here: ReliableMessaging.zip (113.38 KB)   Read the readme.txt file in the archive before running the sample.   Some other things you can do with this sample: 1) Add IsInitiating and/or IsTerminating to the SubmitOrder ...

One of the cooler things about WCF shown at PDC last year was the use of WCF's custom XML stack. In a nutshell, WCF wraps the functionality of existing System.Xml types to allow greater messaging functionality. The types in WCF's xml stack are defined in the System.Runtime.Serialization assembly. Some interesting types in this assembly are ...

As anyone who has written a WCF application knows, getting a ''Hello World'' app to run takes a bit more effort than doing the equivalent in Windows Forms. Don't get me wrong, it is pretty straightforward and simple after you get the hang of it, but it does take a few minutes of effort. The attached VS Template is a way to streamline ...

As some of you know, I began working on a WCF book several months ago. Currently I am looking to increase the size of my “Review Crew” (John Robbin’s term). Hopefully I am not opening myself up to hoards of email, but if you are interested in reviewing my book see the last section of this post. My hope is that more viewpoints will ensure the ...

I just moved a WPF / WCF application from my laptop to my workstation, and it suddenly started crashing Visual Studio as soon as the project loaded (those darn CTPs). After some hunting and pecking around, I came across this post: http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=234330&SiteID=1&PageID=2 It seems that WPF (at least ...