>>>>OK, there is no silverlight section and I do remember a discussion about putting silverlight here.
>>>>
>>>>Has anyone installed Silverlight 4 alongside silverlight 3? I went to a site that is using Silverlight 4 already and I had to install silverlight 4 on my develop machine. Now I cannot debug in my silverlight 3 applications. When I look in control panel I now only have silverlight 4 installed.
>>>>
>>>>I do have the silverlight 3 SDK and Tools for VS2008 installed also. Now I want to install silverlight 4 tools for VS 2010 but don't want to break things any worse.
>>>>
>>>>Anybody doing both?
>>>
>>>Sounds like a job for VMs...
>>>
>>>Maybe you could uninstall SilverLight, then reinstall v3.
>>
>>I could uninstall Silverlight 4 and re-install Silverlight 3 I am sure. However I would like to continue to use Silverlight 3 with my VS2008 existing applications and also use Silverlight 4 with VS2010 with a new application. It appears you cannot have both 3 and 4 installed. I can have *I think* both toolkits installed and this allows you to work on them both but not run them in debug mode.
>>Who here is doing silverlight work?
>>Tim
>
>Hi,
>I don't do much with Silverlight but I have both SilverLight 3 & 4 installed with VS2010 and a project can target either 'Silverlight 3' or 'Silverlight 4'. Debugging works in both. The list of installed Silverlight components is as follows:
>
>Microsoft Silverlight 3 SDK (3.0.40624.0)
>Microsoft Silverlight 3 Tools for Visual Studio 2008 SP1 - ENU (9.0.30730.126)
>Microsoft Silverlight 4 SDK (4.0.50401.0)
>Microsoft Silverlight 4 Tools for Visual Studio 2010 (10.0.30319.156)
>
>I can also still create and debug Silverlight projects in VS2008 (though, of course, only Silverlight 3 versions)
>
>The Silverlight v4 runtime also shows up as a separate install (v 4.0.60401.0) - I assume that's what would be downloaded if it was required to run an external Silverlight 4 page ?)
>
>Don't know if that helps at all,
>Viv

Hi Viv,
The problem seems to be with silverlight runtime as I can still work on my silverlight 3 projects but when I try to start debugging to run them I get an error and it bails out. I now have to start without debugging. The only difference is when Silverlight 4 (not the tools or SDK) got installed it replaced the Silverlight 3 runtime.
It sounds like you are able to run with debugging for both 3 & 4 so when you look in the control panel under programs & features, what version of Silverlight runtime do you have?
Thanks
Tim