[Issue Resolved] : Error occurred in deployment step 'Recycle IIS Application Pool': Invalid namespace SharePoint

Problem/Issue:

Recently, while developing a custom visual web part for SharePoint 2019 On-Premise version, I was facing below error on deployment of the solution:

"Error occurred in deployment step 'Recycle IIS Application Pool': Invalid namespace"

Analysis & findings:
In Past, we'd already faced such issue and it was related to .NET Framework. So, I tried with reducing current version to 4.5 framework but it didn't help much.

Then, I did bit googling, and spent more time to analyze the the issue further. And finally, I was able to find the root cause of the issue. It was related to changes in configuration of development environment.

Solution:
We need to add "IIS 6 WMI Compatibility" feature in our development machine to fix the issue. To add it, we need to follow below steps:

• If you are using windows server, go to server manager. 

• Click on “Add Roles and Feature”.

• It will open “add feature” dialog. Click next till you reach “Server Roles”.

• Expand “Web Server (IIS)”

• Expand “Management Tools”

• Expand “IIS 6 Management Compatibility”

• Now, check “IIS 6 WMI Compatibility”, “IIS 6 Metabase Compatibility” & “IIS 6 Management Console” and click Next.

Note - In my case, the first two features were already installed. If it is not installed in your machine, please select it as well.

• Click Next and move to feature tab.

• Click Install in confirmation installation screen.

• It will start installing the feature. Wait for the completion.

• Click close.

• Restart the visual studio and try to deploy the project and it will deploy successfully. 

If you have any questions you can reach out our SharePoint Consulting team here.