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Now this is one problem that we face when we use a 3rd party DLL, which is not-strongly named & we still want to dump it to GAC.

So, lets see the 5-step solution:

1. Go to Visual Studio Command Prompt
2. Generate a Strong Name Key File
   sn -k keyPair.snk 
3. Obtain MSIL for the assembly
   ildasm Assembly.dll /out:Assembly.il 
    
4. Rename the original assembly
   ren Assembly.dll Assembly.dll.old 
    
5. Create a new assembly from MSIL & Key File
   ilasm Assembly.il /dll /key= keyPair.snk 

While adding a pop-up to a plugin, designed in VS 2008, one of the commonly faced problem is:

Error 1 The best overloaded method match for ‘EnvDTE80.Commands2.AddNamedCommand2(EnvDTE.AddIn, string, string, string, bool, object, ref System.Array, int, int, EnvDTE80.vsCommandControlType)’ has some invalid arguments C:\Punit Ganshani\Desktop Applications\MyAddin2\MyAddin2\Connect.cs 40 24 MyAddin2
Error 2 Argument ‘7′: cannot convert from ‘ref object[]‘ to ‘ref System.Array’ C:\Punit Ganshani\Desktop Applications\MyAddin2\MyAddin2\Connect.cs 40 140 MyAddin2

Resolution:

Change:
object []contextGUIDS = new object[] { };
to:
System.Array contextGUIDS = new object[] { };

and it should compile & execute perfectly.