How do I find the PublicKeyToken for a particular dll

Question

I need to recreate a provider in my web config file that looks something like this    lt membership defaultProvider  AspNetSqlMemProvider  gt     lt providers gt       lt clear  gt       lt add connectionStringName  TRAQDBConnectionString  applicationName  TRAQ  minRequiredPasswordLength  7  minRequiredNonalphanumericCharacters  0           name  AspNetSqlMemProvider           type  System Web Security SqlMembershipProvider  Version 2 0 0 0  Culture neutral  PublicKeyToken B03F5F7F11D50A3A        gt     lt  providers gt   lt  membership gt    However  I get a runtime error saying this assembly cannot be loaded  and I think it is because I have the wrong PublicKeyToken   How do I look up the PublicKeyToken for my assembly   Alternatively  am I going entirely the wrong way with this

User · Answer

Answer is very simple use the  NET Framework tools sn exe  So open the Visual Studio 2008 Command Prompt and then point to the dll   s folder you want to get the public key   Use the following command   sn    T myDLL dll  This will give you the public key token  Remember one thing this only works if the assembly has to be strongly signed   Example  C  WINNT Microsoft NET Framework v3 5 sn -T EdmGen exe  Microsoft  R   NET Framework Strong Name Utility  Version 3 5 21022 8 Copyright  c  Microsoft Corporation   All rights reserved   Public key token is b77a5c561934e089

User · Answer

Using sn exe utility   sn -T YourAssembly dll   or loading the assembly in Reflector

User · Answer

sn -T  lt assembly gt  in Visual Studio command line  If an assembly is installed in the global assembly cache  it s easier to go to C  Windows assembly and find it in the list of GAC assemblies   On your specific case  you might be mixing type full name with assembly reference  you might want to take a look at MSDN

User · Answer

I use Windows Explorer  navigate to C  Windows assembly   find the one I need   From the Properties you can copy the PublicKeyToken   This doesn t rely on Visual Studio or any other utilities being installed

User · Answer

As  CRice said you can use the below method to get a list of dependent assembly with publicKeyToken  public static int DependencyInfo string args         Console WriteLine Assembly LoadFile args  FullName       Console WriteLine Assembly LoadFile args  GetCustomAttributes typeof System Runtime Versioning TargetFrameworkAttribute   false  SingleOrDefault         try           var assemblies   Assembly LoadFile args  GetReferencedAssemblies              if  assemblies GetLength 0   gt  0                        foreach  var assembly in assemblies                                Console WriteLine   -     assembly FullName      ProcessorArchitecture     assembly ProcessorArchitecture                                          return 0                      catch Exception e            Console WriteLine  An exception occurred   0    e Message           return 1             finally        return 1      i generally use it as a LinqPad script  you can call it as  DependencyInfo   c  MyAssembly dll    from the code

User · Answer

You can also check by following method   Go to Run   type the path of DLL for which you need public key  You will find 2 files   1    AssemblyInfo  ini 2  DLL file  Open this   AssemblyInfo  ini file in notepad   here you can see Public Key Token

User · Answer

Just adding more info  I wasn t able to find sn exe utility in the mentioned locations  in my case it was in C  Program Files  x86  Microsoft SDKs Windows v7 0A bin

User · Answer

Using PowerShell  you can execute this statement    system reflection assembly   loadfile  quot C     Full Path    MyDLL dll quot    FullName  The output will provide the Version  Culture and PublicKeyToken as shown below  MyDLL  Version 1 0 0 0  Culture neutral  PublicKeyToken 669e0ddf0bb1aa2a

User · Answer

Assembly LoadFile   C  Windows Microsoft NET Framework v4 0 30319 system data dll   FullName   Will result in     System Data  Version 4 0 0 0  Culture neutral    PublicKeyToken b77a5c561934e089

User · Answer

If you have the DLL added to your project  you can open the csproj file and see the Reference tag   Example    lt Reference Include  System Web Mvc  Version 3 0 0 1  Culture neutral  PublicKeyToken 31bf3856ad364e35  processorArchitecture MSIL    gt

[.net] How do I find the PublicKeyToken for a particular dll?

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