Original link http://techblog.byllemos.com/2008/10/writing-an-automation-for-navision-in-c/   REGISTER You can not registrate the automation directly through VS2008. Here you have to use regasm and gacutil. Regasm is a part of your framework, where as gacutil is a part of Microsoft SDK.   UNREGISTER Ex. on a dos script for registring the automation: set regasm=%windir%\Microsoft.NET\Framework\v2.0.50727\regasm.exeset gacutil=C:\program files\Microsoft SDKs\Windows\v6.0a\bin\g 
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