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The following steps are working for me:

1. Go to C:WindowsSystem32inetsrv and check if the file Microsoft.Web.Administration.dll exists. If you are missing the Microsoft.Web.Administration.dll in C:WindowsSystem32inetsrv, enable IIS Management Console in your Windows Features:

2. In your Visual Studio project, add the reference to the Microsoft.Web.Administration.dll:
   
   


3. Now your .proj-file has the following the entry: <HintPath>C:WindowsSystem32inetsrvMicrosoft.Web.Administration.dll</HintPath>. You could adapt this path to e.g. <HintPath>%windir%System32inetsrvMicrosoft.Web.Administration.dll</HintPath> to make it more robust.

When you move the app to a different system, the app also references to the Microsoft.Web.Administration.dll on the target system. Because the Microsoft.Web.Administration.dll could be different between the windows systems it is not recommended to deliver a copy of this assembly file by the app. A copy could be incompatible with the IIS on the target system.

It is also not recommended to reference a copy of the assembly on the same system, because perhaps the Microsoft.Web.Administrator.dll and the IIS will change due an Windows Update! Then your referenced copy of Microsoft.Web.Administrator.dll is incompatible with the updated IIS.

When the Microsoft.Web.Administrator.dll is missing on the target system, then activate the Management Console as descibed in step 1 above. Alternatively you can use the cmd (open as Administrator) and activate the Windows Feature Management Console by DISM.exe via the following command:

C:WindowsSystem32Dism.exe /enable-feature /online /featurename:IIS-ManagementConsole

This command could be useful when you want to distribute your app via an setup.

You may modify your project file manually. Adding/Changing the reference like below will find the assembly in GAC regardless of its location:

<Reference Include="Microsoft.Web.Administration, Version=7.9.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">

    <SpecificVersion>False</SpecificVersion>

</Reference>

Of course, if the feature "IIS management console" is installed only. You may simply leave a hint in code:

#warning Windows feature "IIS management console" must be installed locally

Search for it in NuGet and install it. It will get installed in packages folder, change the location according to your project structure and re-add the references to reflect new path. Generally I create a lib folder and place all the external libraries.

Folder structure of the project can be

lib -> external libraries

src - > code

tools -> tools such as nant, etc

Microsoft.Web.Administration is used to manage IIS programmatically and it is not available from add reference window. By adding reference from C:WindowsSystem32inetsrv would create reference issues. So, better to have it in lib folder internal to the project and check it in SVN.

1. If you project file, change the hint path to <HintPath>%windir%System32inetsrvMicrosoft.Web.Administration.dll</HintPath>.


2. Check in.
   Then anyone who checks out should see the proper reference if IIS is installed. If IIS is not installed, there will be a reference error they need to resolve.

To resolve, they either install IIS via Programs in Control Panel or via command line as @DzmitryLahoda pointed out.

Again, any trick pointing you to the NuGet packages is improper,

https://blog.lextudio.com/2015/05/whats-microsoft-web-administration-and-the-horrible-facts-you-should-know/

Use Nuget:

Microsoft.Web.Administration

C:WindowsSystem32inetsrv

or

C:Windowswinsxsx86_microsoft.web.administration-nonmsil_31bf3856ad364e35_6.1.7600.16385_none_c8472944f22a9c81

C:WindowsWinSxSx86_microsoft.web.administration-nonmsil_31bf3856ad364e35_6.3.9600.16384_none_5d1097a8ac709c4e

Try to ensure these assemblies are installed via prebuild event:


Dism /online /Enable-Feature /FeatureName:IIS-WebServerManagementTools /All


In installed whole IIS with all features this way, so used FeatureName is guesstimate for assemblies. Try next to list all features for alternative:


dism /online /Get-Features


DISM is available for Windows earlier then 8:

To service inbox drivers in an offline image of Windows Vista with Service Pack 2 (SP2) or Windows Server 2008 with SP2, you must use the Windows 7 version of DISM or PkgMgr. The Windows 7 version of DISM is available in Windows 7 and Windows PE 3.0 operating systems, or can be installed with the Windows Automated Installation Kit (Windows AIK) or the Windows OEM Preinstallation Kit (Windows OPK) for Windows 7.


Also can try for Windows 7 and below:

start /w pkgmgr /iu:IIS-WebServerManagementTools


A bit of extra info, not a direct answer. IIS and IIS Express use two different versions of the same DLL, so your app might accidentally get the wrong one. See http://rdingwall.com/2013/09/22/microsoft-web-administration-confusion/

The simplest way to do this is install NuGet in Visual Studio from this link.
http://visualstudiogallery.msdn.microsoft.com/27077b70-9dad-4c64-adcf-c7cf6bc9970c

Then, in Visual Studio, go to Tools->NuGet Package Manager-> Package Manager Console

Then, select Default Project to be the project that you want to install to.

Finally, Run Install-Package Microsoft.Web.Administration command.