I have an error regarding connecting to my database while querying "employee" from browser using this query string:

http://localhost/MVCDemo/employee/details/1

Screenshots from my desktop for the error:

https://ibb.co/tPGwSGW
https://ibb.co/DbKZgVQ

Screenshots from Visual Studio:

https://ibb.co/rMWp8wX
https://ibb.co/GRPM1Yz

And from SQL Server Management Studio:

https://ibb.co/HKW7gZ6

I googled a lot and the reason is often related to the connection string or a network error in my Windows 10. I tried using other connection strings while paging Stackoverflow.com

but that didn't solve the problem.

Your help is appreciated.