I installed the VS 2010 RC last night, after uninstalling the VS 2010 Beta. If you see that ASP.NET isn’t coming up/working on your machine, you may need to remap the ASP.NET handlers into IIS. To do that, go to the Microsoft.NET 4.0 folder on your machine (typically C:WindowsMicrosoft.NETFramework64v4.0.30128 on a 64-bit Windows install, C:WindowsMicrosoft.NETFrameworkv4.0.30128 on a 32-bit install). Once in that folder, run the following:
After doing this, your ASP.NET applications should start running again. This is the same trick that worked on earlier versions of .NET, but it’s been a while since we had a .NET upgrade. I thought this might help out a few of you out there.