Issues

If you don't know Ian Griffiths, you should.  He's the co-author of my favorite WPF book (with Chris Sells)*.  Ian has a great post today that details a bug with the Silverlight 2 Cross Domain Policy file.  It seems that the Flash crossdomain.xml file is working, but the Silverlight policy file is broken.  Take a read if you are doing cross-domain and pulling out your hair...its a great tip.

* Sure, I wrote the WPF/E appendix but that's not what I prefer it.

In my last post I wrote about how you can use sockets in Silverlight 2 beta 1. Well, when publishing my application to a Internet domain the code didn't work. I always get a socket exception: error code 10013, access denied. I have put an example online at http://frankfurt.schwarz-interactive.de:4501/test.aspx.

I'm following up with the people who wrote the policy code and see what's going on here. You'll get a message here on my blog when there is a fix for the source code or a work-around.

While playing with Astoria and Silverlight today, I found a problem with the WebRequest Headers.  Luckily, Pablo Castro in the ADO.NET Team at Microsoft was there to set me straight.  I wanted to warn everyone of this bug in case it bites you:

The BrowserHttpWebRequest.Accept property is improperly mapped to another HTTP header.  So both of these examples won't work the way you expect:

HttpWebRequest req = new BrowserHttpWebRequest(theUri);
req.Accept = "application/json"; // Bugged
req.Headers[HttpRequestHeader.Accept] = "application/json"; // Bugged

To get around this problem, use the weakly typed Header collection:

HttpWebRequest req = new BrowserHttpWebRequest(theUri);
req.Headers["accept"] = "application/json"; // Works

Thanks again Pablo!

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Last week Silverlight 1.1 Tools Alpha for VS 2008 RTM were released and as a developer working with Silverlight I run to install them on my fresh new copy of VS 2008 RTM. The installation went without any problems, but unfortunately after trying to create a new Silverlight project (same for class library) I got a popup error saying:

"The project file 'C:\Users\estoychev\AppData\Local\Temp\zhxiyguv.4rr\Temp\SilverlightProject1.csproj' cannot be opened. The project type is not supported by this installation."

Puff.