Get Public Key Token for Assembly in Visual Studio

In Visual Studio Click Tools > External Tools > Add and enter the following:

GetPublicKey

Command: C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\Bin\sn.exe
Arguments: -T $(TargetPath)

Note: The path for the command can be different depending on you Visual Studio version. Just check in your file directory where the sn.exe is (might be v6.0A instead of v7.0A).