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:

<membership defaultProvider="AspNetSqlMemProvider">
      <providers>
                <clear/>
       <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"/>
      </providers>
     </membership>

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?

Answer 1

sn -T <assembly> 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.

Answer 2

Using sn.exe utility:

sn -T YourAssembly.dll

or loading the assembly in Reflector.