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copied!<p>In my case, I have a suite of add-ins under MyCompany.Office.</p> <p>I have a shared library of core functionality called MyCompany.Office.dll, which is referenced by MyCompany.Office.Word.dll and MyCompany.Office.Excel.dll, which are both add-ins (you could easily have multiple add-ins for Excel rather than one for Word and one for Excel, or whatever you want).</p> <p>What I did was create a strong name keyfile for the solution and linked it in all three projects. I then signed all three libraries with the same strong name keyfile.</p> <p>I then created an Installer Action that adds a CAS entry using the public key as evidence, rather than the file location. so, my custom action ultimately invokes <code>caspol.exe -m -q -ag "My_Computer_Zone" -strong -hex <my public key> -noname -noversion FullTrust -n "MyCompany_Office" -d "Code group for MyCompany.Office add-ins."</code>. This gives FullTrust to all libraries with that public key.</p> <p>You can view the public key by opening a command prompt, navigating to the keyfile location and typing <code>sn -Tp mykeyfile.snk</code>. If you want to get the public key pro grammatically (like extending SetSecurity), you could use code like this:</p> <pre><code>private static String GetPublicKeyHexString(String assemblyPath) { AssemblyName assmName = Assembly.LoadFile(assemblyPath).GetName(); StringBuilder output = new StringBuilder(); Byte[] publicKey = assmName.GetPublicKey(); foreach(Byte byte in publicKey) { output.Append(byte.ToString("x").PadLeft(2, '0')); } return output.ToString(); } </code></pre>

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