ASP.NET 4 Breaking Changes
The ASP.NET 4.0 has been a core update to ASP.NET 2.0. .NET 3.0 and .NET 3.5 were based on .NET 2.0 having additional assemblies only, not the core components. If you have installed all of these frameworks 2.0, 3.0, 3.5, 4.0 and you try to upgrade your ASP.NET 2.0 application, in IIS you will be … Read more