While following the tutorial, I am getting an error when DbContextOptions
which is ApplicationDbContext inherit to IdentityDbContext but
For a perfect answer I need more information but form the error image you seem to be mixing ASP.Net packages and ASP.NETCore packages.
You have referenced Microsoft.EntityFrameworkCore
which is a .net core package but then referenced Microsoft.AspNet.Identity.EntityFramework
which is a .net (not core) package.
Remove the later package and reference Microsoft.AspNetCore.Identity.EntityFrameworkCore
instead and it should work