What is PublicKeyToken?

[shapper]

Hello,

I just compiled a library and I am adding a similar code line in my
Web.Config file to my library:
<add assembly = "System, Version = 1.0.3300.0, Culture = neutral,
PublicKeyToken = B77A5C561934E089" />

My question is: what is PublicKeyToken?
Where can I find it?

In my library the only thing I have near it is:
GUID: e8fb24dc-72c0-4da1-b730-a475a11cdc76

But it is not in the same format.

Thanks,
Miguel

 

[Chris Fulstow]

The public key token is a 64-bit hash of the public key which
corresponds to the private key used to sign the assembly. It's used to
make an assembly name unique, so two strongly named assemblies can have
the same filename, but .NET will treat them as different assemblies.