添加项目文件。

DomainCommons/AggregateRootEntity.cs

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+namespace IM.DomainCommons
+{
+    public class AggregateRootEntity : BaseEntity, IAggregateRoot, ISoftDelete, IHasCreationTime, IHasDeletionTime, IHasModificationTime
+    {
+        public bool IsDeleted { get; private set; }
+
+        public DateTimeOffset CreationTime { get; private set; } = DateTime.Now;
+
+        public DateTimeOffset? Deletion { get; private set; }
+
+        public DateTimeOffset? ModificationTime { get; set; }
+
+        public void SoftDelete()
+        {
+            Deletion = DateTime.Now;
+            IsDeleted = true;
+        }
+
+        public void NotifyModified()
+        {
+            ModificationTime = DateTime.Now;
+        }
+    }
+}

DomainCommons/BaseEntity.cs

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+using MassTransit;
+using MediatR;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace IM.DomainCommons
+{
+    public class BaseEntity : IEntity, IDomainEvents
+    {
+        /// <summary>
+        /// 这里使用连续guid，防止数据库性能问题
+        /// </summary>
+        public Guid Id { get; private set; } = NewId.NextGuid();
+
+        [NotMapped]
+        public List<INotification> domainEvents = [];
+
+        public void AddDomainEvent(INotification eventItem)
+        {
+            domainEvents.Add(eventItem);
+        }
+
+        public void AddDomainEventIfAbsent(INotification eventItem)
+        {
+            if (!domainEvents.Contains(eventItem))
+            {
+                domainEvents.Add(eventItem);
+            }
+        }
+
+        public void ClearDomainEvents()
+        {
+            domainEvents.Clear();
+        }
+
+        public IEnumerable<INotification> GetDomainEvents()
+        {
+            return domainEvents;
+        }
+    }
+}

DomainCommons/DomainException.cs

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+namespace IM.DomainCommons
+{
+    public class DomainException : Exception
+    {
+        public DomainException(string message) : base(message)
+        {
+
+        }
+    }
+}

DomainCommons/IAggregateRoot.cs

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+namespace IM.DomainCommons
+{
+    public interface IAggregateRoot
+    {
+    }
+}

DomainCommons/IDomainEvents.cs

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+using MediatR;
+
+namespace IM.DomainCommons
+{
+    public interface IDomainEvents
+    {
+        IEnumerable<INotification> GetDomainEvents();
+        void AddDomainEvent(INotification eventItem);
+        void AddDomainEventIfAbsent(INotification eventItem);
+        void ClearDomainEvents();
+    }
+}

DomainCommons/IEntity.cs

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+namespace IM.DomainCommons
+{
+    public interface IEntity
+    {
+        Guid Id { get; }
+    }
+}

DomainCommons/IHasCreationTime.cs

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+namespace IM.DomainCommons
+{
+    public interface IHasCreationTime
+    {
+        DateTimeOffset CreationTime { get; }
+    }
+}

DomainCommons/IHasDeletionTime.cs

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+namespace IM.DomainCommons
+{
+    public interface IHasDeletionTime
+    {
+        DateTimeOffset? Deletion { get; }
+    }
+}

DomainCommons/IHasModificationTime.cs

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+namespace IM.DomainCommons
+{
+    public interface IHasModificationTime
+    {
+        DateTimeOffset? ModificationTime { get; }
+    }
+}

DomainCommons/IM.DomainCommons.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="MediatR" Version="14.1.0" />
+    <PackageReference Include="NewId" Version="4.0.1" />
+  </ItemGroup>
+
+</Project>

DomainCommons/ISoftDelete.cs

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+namespace IM.DomainCommons
+{
+    public interface ISoftDelete
+    {
+        bool IsDeleted { get; }
+        void SoftDelete();
+    }
+}