How to automatically populate CreatedDate and ModifiedDate?

Question

I am learning ASP.NET Core MVC and my model is

namespace Joukyuu.Models
{
    public class Passage
    {
        public int PassageId { get; set; }
        publi         


        

Answer 1

Solution for CreationDate in PostgreSQL:

builder.Property(e => e.CreationDate)
  .HasColumnType("timestamp without time zone")
  .HasDefaultValueSql("NOW()")
  .ValueGeneratedOnAdd();

via: https://www.npgsql.org/efcore/modeling/generated-properties.html#guiduuid-generation Unfortunately there is not solution for update event