# FinalBuilder 3.0 and & VS2005 - plugin

**URL:** https://www.finalbuilder.com/forums/t/finalbuilder-3-0-and-vs2005-plugin/190
**Category:** Discussion
**Created:** [September 7, 2006, 1:14am UTC](https://www.finalbuilder.com/forums/t/finalbuilder-3-0-and-vs2005-plugin/190 "2006-09-07T01:14:52Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![deleted\_user](https://www.finalbuilder.com/forums/user_avatar/www.finalbuilder.com/deleted_user/32/937_2.png) [@deleted\_user](https://www.finalbuilder.com/forums/u/deleted_user)
#### Post date: [September 7, 2006, 1:14am UTC](https://www.finalbuilder.com/forums/t/finalbuilder-3-0-and-vs2005-plugin/190/1 "2006-09-07T01:14:52Z")

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I have tried to create plugin for FB3.0 based on .net 2.0 framework(in VS2005)  
Unfortunately when I am trying to use my new action message appears:  
"Error Validating action : the format of the ‘nameofassembly’ is invalid"  
What can I do with that?  
------------  
Than you  
strojak

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### Author: ![tate](https://www.finalbuilder.com/forums/letter_avatar_proxy/v4/letter/t/e19b73/32.png) [@tate](https://www.finalbuilder.com/forums/u/tate)
#### Post date: [September 8, 2006, 3:40am UTC](https://www.finalbuilder.com/forums/t/finalbuilder-3-0-and-vs2005-plugin/190/2 "2006-09-08T03:40:00Z")

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Hi strojak,  
  
FinalBuilder 3 can’t host .Net 2.0 based custom actions as it’s tied to the 1.1 version of the framework. FinalBuilder 4 allows you to choose which version of the CLR to host (ie. either 1.0, 1.1 or 2.0) and therefore you can write .Net 2.0 action in FB4.  
  
cheers,  
tate.