How to determine the \Temporary ASP.NET Files\root\{site hash} with PowerShell?

Question

ASP.NET makes use of a temporary files directory to store files for Shadow Copying and Dynamic Compilation. A typical path will look like this. Note the hash on the end of the p

Answer 1

Well, a few moments with Reflector, searching all members within System.Web for the word "Temporary" shows this call gets me here:

string str2 = AppManagerAppDomainFactory.ConstructSimpleAppName(AppDomainAppVirtualPath);

But then I remember that the source code is available for all of .NET, so I move to the actual code, rather than the reflectored code: https://referencesource.microsoft.com/#System.Web/HttpRuntime.cs,870

Later in that method "SetupCodeGenDirectory" the path appears to be built on top of with

 this._codegenDir = Thread.GetDomain().DynamicDirectory;

So, looks like that hash is from DynamicDirectory. That's over here at http://referencesource.microsoft.com/#mscorlib/system/appdomain.cs#2792 which looks like an extern that is inside some COM Fusion Loader stuff:

[ComImport,InterfaceType(ComInterfaceType.InterfaceIsIUnknown), Guid("7c23ff90-33af-11d3-95da-00a024a85b51")]

But that GUID leads me here http://referencesource.microsoft.com/#mscorlib/microsoft/win32/fusionwrap.cs#94

which implies it's a public key token part:

     public const uint HASH_VALUE            = PUBLIC_KEY_TOKEN + 1;
     public const uint NAME                  = HASH_VALUE + 1;

That perhaps it's NAME? I'm guessing it's yourAssembly.GetPublicKeyToken();

OR, just change the folder that your temporary ASP.NET files go to in config section http://msdn.microsoft.com/en-us/library/system.web.configuration.compilationsection.tempdirectory%28VS.80%29.aspx in system.web in web.config