An ASP.NET Core Web App which lets sign-in users (including in your org, many orgs, orgs + personal accounts, sovereign clouds) and call Web APIs (including Microsoft Graph)

Documentation for Microsoft Dynamics 365 apps such as Dynamics 365 Finance, Dynamics 365 Commerce, Dynamics 365 Supply Chain Management, and Dynamics 365 Human Resources

A .NET Core daemon console application calling Microsoft Graph or your own WebAPI with its own identity