The [Column(TypeName = "decimal(18, 2)")] data annotation is required so Entity Framework Core can correctly map Price to currency in the database. For more information, see Data Types.
source : https://github.com/dotnet/AspNetCore.Docs/blob/main/aspnetcore/tutorials/razor-pages/validation.md

https://stackoverflow.com/questions/48205531/display-edit-a-currency-in-asp-net-mvc-core-why-so-complicated