Custom solutions that target .Netframework 4.5 will work in SharePoint 2016?

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Custom solutions that target .Netframework 4.5 will work in SharePoint 2016?

adil 1,431

Hai have SharePoint 2013 Content database required to upgrade to SharePoint 2016, I started now the Test Upgrade https://learn.microsoft.com/en-us/sharepoint/upgrade-and-update/upgrade-content-databases

SP 2013 Farm has deployed Custom Solutions that was targeted to .Net Framework 4.5 my question is when i take backup and deploy in Test SP 2016 farm is these farm solutions works? or Sp2013 Solutions is required to upgrade that SharePoint 2016 built on Microsoft .NET Framework version 4.6?

Emily Du-MSFT 51,986 Reputation points Microsoft External Staff

2021-01-04T01:35:51.987+00:00

@adil
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Emily Du-MSFT 51,986 Reputation points Microsoft External Staff

2021-01-08T09:45:43.763+00:00

@adil
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Emily Du-MSFT 51,986 Reputation points Microsoft External Staff

2021-01-04T01:35:51.987+00:00

@adil
I'm checking how the things are going on about this issue. Whether the answer helps you?

You can accept the answer if it helps.

If an Answer is helpful, please click "Accept Answer" and upvote it.
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Emily Du-MSFT 51,986 Reputation points Microsoft External Staff

2021-01-08T09:45:43.763+00:00

@adil
Is there any progress on this issue?

If you find any answers helpful to you, please remember to accept them as answers.

It will help others who meet the similar question in this forum.

Thank you for your understanding.

If an Answer is helpful, please click "Accept Answer" and upvote it.

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Answer 1

As a short answer, Yes, SharePoint 2013 WSP Solutions would work in SharePoint 2016!
The SharePoint handles the .NET Assembly redirects. so that the SharePoint 2013 dlls will be redirected automatically to SharePoint 2016 dlls.

If you have noticed that some WSPs don't work, so you have to do the following:

You should first make sure that there're no dependencies for other 3rd party tools or components in your old solutions!

If you have the source solution of the deployed WSP, so you should do the following:
- In SharePoint 2016 Test environment, Install VS 2017/2019.
- Install Office / SharePoint template in Visual Studio 2017/2019.
- Open your solution using VS, The VS would upgrade your solution automatically. otherwise, you have to remove all SharePoint.dll references and re-add them again.
- Finally, build and deploy your solution.
If you just have the WSP files, so you should redeploy theses solutions again like the following:
- Retract and remove the installed SharePoint WSP Solutions
- Then install the WSP solution again.

Answer 2

Emily Du-MSFT 51,986 Microsoft External Staff

@adil
Custom solutions can be deployed in the SharePoint 2016. Custom solutions are not required to be upgraded even though SharePoint 2016 is built on Microsoft .NET Framework version 4.6.

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Custom solutions that target .Netframework 4.5 will work in SharePoint 2016?

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