I just found out that LightSwitch 2011 is out. I tried to install it and found out that Visual Studio 2010 Ultimate Service Pack 1 is a pre-requisite. I installed the Service Pack and then it allowed me to install LightSwitch 2011. All well and good.
Now when I start a new LightSwitch project, it gives me an error that “Unable to find a version of silverlight development runtime installed. Please install the silverlight development runtime.” and then there’s the link. I click on the link, install whatever is required and the installation fails.
After trying a couple of options I got the response from MSDN Forums that I should uninstall everything and re-install. Tried that. Same error again.
Another response on msdn forums says that my silverlight runtime and developer package must match. I check and find out that they are different versions
Developer Package: 4.0.60129.0
Microsoft Silverlight: 4.0.51204.0
That’s what’s causing the problem. How can I upgrade both to the latest version and make them match?
I deleted all entries of “silverlight” from the registry manually. It was a long and painful process. It still didn’t work.
I had to reinstall Windows.
It finally works now. I was able to install the latest version of silverlight and work on LightSwitch 2011 finally.