# RobotStudio Add-In and .Net Framework 4.0

**URL:** <https://tech-community.robotics.abb.com/t/robotstudio-add-in-and-net-framework-4-0/4614>\
**Category:** RobotStudio\
**Created:** [January 13, 2012, 3:03pm UTC](https://tech-community.robotics.abb.com/t/robotstudio-add-in-and-net-framework-4-0/4614 "2012-01-13T15:03:37Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![SteveO](https://avatars.discourse-cdn.com/v4/letter/s/87869e/32.png) [@SteveO](https://tech-community.robotics.abb.com/u/SteveO)\
**Post date:** [January 13, 2012, 3:03pm UTC](https://tech-community.robotics.abb.com/t/robotstudio-add-in-and-net-framework-4-0/4614/1 "2012-01-13T15:03:37Z")

</div>

Hello,

I would like to use a library in my robotstudio addin which needs .Net Framework 4.  
So I decided to changed the Target Framework in Visual Studio to .Net Framework 4.  
After I changed the framework the addin does not even appear in Robotstudio.

Is it possible to use .Net Framework 4 in Robstudio addins?  
I use Robotstudio 5.13.02.

Best regards,  
Steve

---

<div class="post-metadata">

**Author:** ![Anders\_S](https://avatars.discourse-cdn.com/v4/letter/a/ce7236/32.png) [@Anders\_S](https://tech-community.robotics.abb.com/u/Anders_S)\
**Post date:** [January 13, 2012, 3:47pm UTC](https://tech-community.robotics.abb.com/t/robotstudio-add-in-and-net-framework-4-0/4614/2 "2012-01-13T15:47:17Z")

</div>

In RS 5.13.xx you can not use .Net Framework 4, but in RS 5.14 you can.