How to naming namespaces for product that have sub-products/modules?

Question

I read that carefully. And yes very helpful!

https://docs.microsoft.com/en-us/dotnet/standard/design-guidelines/names-of-namespaces

Assuming you have following products and namespaces

Microsoft.Dynamics.Inventory     is a DLL
Microsoft.Dynamics.Bank          is a DLL

Each of above have (Views, Reports, Utils, etc)

Microsoft.Dynamics.Inventory.DLL

Should I go for that?

Microsoft.Dynamics.Inventory.Sales.Reports
Microsoft.Dynamics.Inventory.Sales.Views
Microsoft.Dynamics.Inventory.Sales.Controls

Microsoft.Dynamics.Inventory.Purchase.Reports
Microsoft.Dynamics.Inventory.Purchase.Views
Microsoft.Dynamics.Inventory.Purchase.Controls

Or Go for that? (Currently used)

Microsoft.Dynamics.Inventory.Reports.Sales
Microsoft.Dynamics.Inventory.Views.Sales
Microsoft.Dynamics.Inventory.Controls.Sales

Microsoft.Dynamics.Inventory.Reports.Purchase
Microsoft.Dynamics.Inventory.Views.Purchase
Microsoft.Dynamics.Inventory.Controls.Purchase

When you write using directives the first one appears good. But the folder structures will be bad.

1. If I use second approach I got very good structured folders See Image
2. If I use first approach each Sub-Module have Views, Reports, Controls (Duplicated)

Please its not opinion based. I actually afraid for a bad structured later will become worse.

I can't imagine an example with System.Data.SqlClient are not System.SqlClient.Data alright?

Usually

System.Data.Common can used bellow
System.Data.OleDb
System.Data.SqlClient
System.Data.AnyProvider

How to apply that structure to My example above?

Notes

1. A Sales maybe doesn't have Reports (So are first approach bad?)
2. A Purchase maybe doesn't have controls (So are first approach bad?)

I see that in MVC architecture they go with second approach. I don't sure about that.

https://github.com/cruzerM/erp-bank-net/tree/master/ERP_BANK.Web/Views

So should I fllow second approach?