diff --git a/sample/Tenant.Api.Contracts/DDD/Domain/Consts/TenantConnectionStringConsts.cs b/sample/Tenant.Api.Contracts/DDD/Domain/Consts/TenantConnectionStringConsts.cs
new file mode 100644
index 0000000..cff4313
--- /dev/null
+++ b/sample/Tenant.Api.Contracts/DDD/Domain/Consts/TenantConnectionStringConsts.cs
@@ -0,0 +1,14 @@
+namespace Tenant.Api.DDD.Domain.Consts;
+
+public static class TenantConnectionStringConsts
+{
+    /// <summary>
+    /// Default value: 64
+    /// </summary>
+    public static int MaxNameLength { get; set; } = 64;
+
+    /// <summary>
+    /// Default value: 1024
+    /// </summary>
+    public static int MaxValueLength { get; set; } = 1024;
+}
diff --git a/sample/Tenant.Api.Contracts/DDD/Domain/Consts/TenantConsts.cs b/sample/Tenant.Api.Contracts/DDD/Domain/Consts/TenantConsts.cs
new file mode 100644
index 0000000..b209623
--- /dev/null
+++ b/sample/Tenant.Api.Contracts/DDD/Domain/Consts/TenantConsts.cs
@@ -0,0 +1,9 @@
+namespace Tenant.Api.DDD.Domain.Consts;
+
+public static class TenantConsts
+{
+    /// <summary>
+    /// Default value: 64
+    /// </summary>
+    public static int MaxNameLength { get; set; } = 64;
+}
diff --git a/sample/Tenant.Api.Contracts/DDD/Domain/Shared/TenantEto.cs b/sample/Tenant.Api.Contracts/DDD/Domain/Shared/TenantEto.cs
new file mode 100644
index 0000000..6d166bd
--- /dev/null
+++ b/sample/Tenant.Api.Contracts/DDD/Domain/Shared/TenantEto.cs
@@ -0,0 +1,11 @@
+using System;
+
+namespace Tenant.Api.DDD.Domain.Shared;
+
+[Serializable]
+public class TenantEto
+{
+    public Guid Id { get; set; }
+
+    public string Name { get; set; }
+}
diff --git a/sample/Tenant.Api.Contracts/Tenant.Api.Contracts.csproj b/sample/Tenant.Api.Contracts/Tenant.Api.Contracts.csproj
new file mode 100644
index 0000000..c1179db
--- /dev/null
+++ b/sample/Tenant.Api.Contracts/Tenant.Api.Contracts.csproj
@@ -0,0 +1,13 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Folder Include="DDD\Application\Dtos\" />
+  </ItemGroup>
+
+</Project>
diff --git a/sample/Tenant.Api/DDD/Application/TenantAppService.cs b/sample/Tenant.Api/DDD/Application/TenantAppService.cs
new file mode 100644
index 0000000..8b43f6e
--- /dev/null
+++ b/sample/Tenant.Api/DDD/Application/TenantAppService.cs
@@ -0,0 +1,7 @@
+using Easy.DDD.Application;
+
+namespace Tenant.Api.DDD.Application;
+
+public class TenantAppService : IApiService
+{
+}
diff --git a/sample/Tenant.Api/DDD/Domain/TenantAggregation/ITenantManager.cs b/sample/Tenant.Api/DDD/Domain/TenantAggregation/ITenantManager.cs
new file mode 100644
index 0000000..fd87f75
--- /dev/null
+++ b/sample/Tenant.Api/DDD/Domain/TenantAggregation/ITenantManager.cs
@@ -0,0 +1,8 @@
+namespace Tenant.Api.DDD.Domain.TenantAggregate;
+
+public interface ITenantManager
+{
+    Task<Tenant> CreateAsync(string name);
+
+    Task ChangeNameAsync(Tenant tenant, string name);
+}
diff --git a/sample/Tenant.Api/DDD/Domain/TenantAggregation/Tenant.cs b/sample/Tenant.Api/DDD/Domain/TenantAggregation/Tenant.cs
new file mode 100644
index 0000000..4e72417
--- /dev/null
+++ b/sample/Tenant.Api/DDD/Domain/TenantAggregation/Tenant.cs
@@ -0,0 +1,56 @@
+using Easy;
+using Easy.DDD.Domain.Entities;
+using Tenant.Api.DDD.Domain.Consts;
+
+namespace Tenant.Api.DDD.Domain.TenantAggregation;
+
+public class Tenant : AggregateRoot<Guid>
+{
+    public virtual string Name { get; protected set; }
+
+    public virtual List<TenantConnectionString> ConnectionStrings { get; protected set; }
+
+    protected Tenant()
+    {
+
+    }
+
+    protected internal Tenant(Guid id, string name)
+        : base(id)
+    {
+        SetName(name);
+
+        ConnectionStrings = new List<TenantConnectionString>();
+    }
+
+
+    public virtual void SetConnectionString(string name, string connectionString)
+    {
+        var tenantConnectionString = ConnectionStrings.FirstOrDefault(x => x.Name == name);
+
+        if (tenantConnectionString != null)
+        {
+            tenantConnectionString.SetValue(connectionString);
+        }
+        else
+        {
+            ConnectionStrings.Add(new TenantConnectionString(Id, name, connectionString));
+        }
+    }
+
+
+    public virtual void RemoveConnectionString(string name)
+    {
+        var tenantConnectionString = ConnectionStrings.FirstOrDefault(x => x.Name == name);
+
+        if (tenantConnectionString != null)
+        {
+            ConnectionStrings.Remove(tenantConnectionString);
+        }
+    }
+
+    protected internal virtual void SetName(string name)
+    {
+        Name = Check.NotNullOrWhiteSpace(name, nameof(name), TenantConsts.MaxNameLength);
+    }
+}
diff --git a/sample/Tenant.Api/DDD/Domain/TenantAggregation/TenantConnectionString.cs b/sample/Tenant.Api/DDD/Domain/TenantAggregation/TenantConnectionString.cs
new file mode 100644
index 0000000..9eeea0d
--- /dev/null
+++ b/sample/Tenant.Api/DDD/Domain/TenantAggregation/TenantConnectionString.cs
@@ -0,0 +1,36 @@
+using Easy;
+using Easy.DDD.Domain.Entities;
+using Tenant.Api.DDD.Domain.Consts;
+
+namespace Tenant.Api.DDD.Domain.TenantAggregation;
+
+public class TenantConnectionString : Entity
+{
+    public virtual Guid TenantId { get; protected set; }
+
+    public virtual string Name { get; protected set; }
+
+    public virtual string Value { get; protected set; }
+
+    protected TenantConnectionString()
+    {
+
+    }
+
+    public TenantConnectionString(Guid tenantId, string name, string value)
+    {
+        TenantId = tenantId;
+        Name = Check.NotNullOrWhiteSpace(name, nameof(name), TenantConnectionStringConsts.MaxNameLength);
+        SetValue(value);
+    }
+
+    public virtual void SetValue(string value)
+    {
+        Value = Check.NotNullOrWhiteSpace(value, nameof(value), TenantConnectionStringConsts.MaxValueLength);
+    }
+
+    public override object[] GetKeys()
+    {
+        return new object[] { TenantId, Name };
+    }
+}
diff --git a/sample/Tenant.Api/DDD/Domain/TenantAggregation/TenantManager.cs b/sample/Tenant.Api/DDD/Domain/TenantAggregation/TenantManager.cs
new file mode 100644
index 0000000..9af193b
--- /dev/null
+++ b/sample/Tenant.Api/DDD/Domain/TenantAggregation/TenantManager.cs
@@ -0,0 +1,44 @@
+using Easy;
+using Easy.DDD.Domain.Repositories;
+using Easy.Guids;
+using Microsoft.EntityFrameworkCore;
+
+namespace Tenant.Api.DDD.Domain.TenantAggregation;
+
+public class TenantManager
+{
+    public IRepository<Tenant> TenantRepository { get; }
+    protected IGuidGenerator GuidGenerator { get; }
+    public TenantManager(IRepository<Tenant> tenantRepository)
+    {
+        TenantRepository = tenantRepository;
+    }
+    public virtual async Task<Tenant> CreateAsync(string name)
+    {
+        Check.NotNull(name, nameof(name));
+
+        await ValidateNameAsync(name);
+        return new Tenant(GuidGenerator.Create(), name);
+    }
+
+    public virtual async Task ChangeNameAsync(Tenant tenant, string name)
+    {
+        Check.NotNull(tenant, nameof(tenant));
+        Check.NotNull(name, nameof(name));
+
+        await ValidateNameAsync(name, tenant.Id);
+        tenant.SetName(name);
+    }
+
+    protected virtual async Task ValidateNameAsync(string name, Guid? expectedId = null)
+    {
+        var tenant = await TenantRepository
+            .Where(o => o.Name == name)
+            .Include(x => x.ConnectionStrings)
+            .OrderBy(t => t.Id)
+            .FirstOrDefaultAsync();
+
+        When.Is(tenant != null && tenant.Id != expectedId, "重复的租户名称: " + name);
+
+    }
+}
diff --git a/sample/Tenant.Api/TenantMappingProfile.cs b/sample/Tenant.Api/TenantMappingProfile.cs
new file mode 100644
index 0000000..e0a4d8d
--- /dev/null
+++ b/sample/Tenant.Api/TenantMappingProfile.cs
@@ -0,0 +1,13 @@
+using AutoMapper;
+using Tenant.Api.DDD.Domain.Shared;
+
+namespace Tenant.Api.DDD.Domain;
+
+public class TenantMappingProfile : Profile
+{
+    public TenantMappingProfile()
+    {
+
+        CreateMap<TenantAggregate.Tenant, TenantEto>();
+    }
+}