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I've installed Windows 8, Visual Studio 2012 but don't have a v4.5 directory in %WINDIR%\Microsoft.NET\Framework.
Have I done something wrong, or is .NET 4.5 different from others?
If it's because I have not installed the tools, is there a set of different tools to download? As far as I can tell, I am able to build .NET 4.5 apps OK.
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An assembly can be found mostly in either of the following places: GAC - C:\Windows\Assembly\GAC (Microsoft provided and by third-party in some cases) Installation folder (most of the third-party controls)
The 64-bit registry is available in the HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ subkey. For example, the registry subkey for . NET Framework 4.5 is HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\NET Framework Setup\NDP\v4\Full. Check the Release REG_DWORD value to determine the installed version.
Where is GAC (Global Assembly Cache) located? GAC is located in %windir%\assembly (for example, C:\WINDOWS\assembly) and it is a shared repository of libraries.
.NET 4.5 is an in place replacement for 4.0 - you will find the assemblies in the 4.0 directory.
See the blogs by Rick Strahl and Scott Hanselman on this topic.
You can also find the specific versions in:
C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework
EDIT: This answer was correct until mid-2013, but you may have a more recent version since the big msbuild change. See the answer from Jonny Leeds for more details.
The version under C:\Windows\Microsoft.NET\Framework\v4.0.30319 actually is .NET 4.5. It's a little odd, but certainly mscorlib there contains AsyncTaskMethodBuilder etc which are used for async.
.NET 4.5 effectively overwrites .NET 4.
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