c# soft delete

DbContextBase.cs

using System;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.EntityFrameworkCore;
using Scratch.Core.Shared;

namespace Scratch.Infrastructure.Data
{
    public class DbContextBase : DbContext
    {
        public DbContextBase()
        {
        }

        public DbContextBase(DbContextOptions options) : base(options)
        {
        }

        public override Task<int> SaveChangesAsync(bool acceptAllChangesOnSuccess,
            CancellationToken cancellationToken = default)
        {
            SaveChanges(acceptAllChangesOnSuccess);
            return base.SaveChangesAsync(acceptAllChangesOnSuccess, cancellationToken);
        }

        public override int SaveChanges(bool acceptAllChangesOnSuccess)
        {
            ChangeTracker.DetectChanges();
            SoftDeleteEntities();
            UpdateTimestamps();
            return base.SaveChanges(acceptAllChangesOnSuccess);
        }

        private void UpdateTimestamps()
        {
            var modified = ChangeTracker.Entries<IHasTimestamps>()
                .Where(e => e.State == EntityState.Modified);
            foreach (var item in modified)
            {
                item.Entity.Modified = DateTime.Now;
            }
        }

        private void SoftDeleteEntities()
        {
            var deleted = ChangeTracker.Entries<ISoftDelete>()
                .Where(e => e.State == EntityState.Deleted);
            foreach (var item in deleted)
            {
                // dont remove the record
                item.State = EntityState.Unchanged;
                // but mark it as deleted
                item.Entity.IsDeleted = true;
            }
        }
    }
}

Entity.cs

using System;

namespace Scratch.Core.Shared
{
    public interface IHasTimestamps
    {
        DateTime Created { get; }
        DateTime Modified { get; set; }
    }

    public interface ISoftDelete
    {
        bool IsDeleted { get; set; }
    }

    public abstract class Entity : IHasTimestamps, ISoftDelete
    {
        public Guid Id { get; protected set; }
        public DateTime Created { get; } = DateTime.Now;
        public DateTime Modified { get; set; }
        public bool IsDeleted { get; set; } = false;
    }
}