diff --git a/OptionStudy.Next/3配置绑定/ConfigBinderTest.cs b/OptionStudy.Next/3配置绑定/ConfigBinderTest.cs
index f63d759..2855d24 100644
--- a/OptionStudy.Next/3配置绑定/ConfigBinderTest.cs
+++ b/OptionStudy.Next/3配置绑定/ConfigBinderTest.cs
@@ -1,7 +1,7 @@
 
 using OptionStudy.UnitApp.Next;
 
-namespace OptionStudy.Next._3配置绑定
+namespace OptionStudy.Next
 {
     /// <summary>
     /// 配置绑定 测试
diff --git a/OptionStudy.Next/4配置同步/ConfigSyncTest.cs b/OptionStudy.Next/4配置同步/ConfigSyncTest.cs
new file mode 100644
index 0000000..cfca45c
--- /dev/null
+++ b/OptionStudy.Next/4配置同步/ConfigSyncTest.cs
@@ -0,0 +1,125 @@
+
+using OptionStudy.UnitApp.Next;
+
+namespace OptionStudy.Next
+{
+    /// <summary>
+    /// 配置的同步
+    /// </summary>
+    public class ConfigSyncTest : IDisposable
+    {
+        private readonly ITestOutputHelper testOutput;
+
+        public ConfigSyncTest(ITestOutputHelper testOutputHelper)
+        {
+            this.testOutput = testOutputHelper;
+        }
+
+        /// <summary>
+        /// 触发同步事件
+        /// Provider 执行 Load() 方法
+        /// </summary>
+        [Fact]
+        public void SyncConfigFor_Provider_Load_Test()
+        {
+            var filePath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Configs/appsettings.json");
+
+            var root = new ConfigurationBuilder()
+                .AddJsonFile(filePath, false, true)
+                .Build();
+            bool excuted =false;
+
+            Action<object?> run = (obj) => // 执行事件
+            {
+                excuted=true;
+                var configJsonText = System.Text.Json.JsonSerializer.Serialize(root.Get<AppOption>());
+                testOutput?.WriteLine(configJsonText);
+            };
+
+            //注册回调事件
+            root.GetReloadToken().RegisterChangeCallback(run,null);
+
+            //触发回调：Provider 重新加载数据
+            root.Providers.First().Load();
+
+            //等待一会，监控到文件变化后会执行回调方法
+            Thread.Sleep(500);
+
+            //回调执行过
+            Assert.True(excuted);
+        }
+
+        /// <summary>
+        /// 触发同步事件
+        /// IConfigurationRoot 执行 Reload() 方法
+        /// </summary>
+        [Fact]
+        public void SyncConfigFor_IConfigurationRoot_Reload_Test()
+        {
+            var filePath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Configs/appsettings.json");
+
+            var root = new ConfigurationBuilder()
+                .AddJsonFile(filePath, false, true)
+                .Build();
+
+            bool excuted = false;
+            Action<object?> run = (obj) => // 执行事件
+            {
+                excuted = true;
+                var configJsonText = System.Text.Json.JsonSerializer.Serialize(root.Get<AppOption>());
+                testOutput?.WriteLine(configJsonText);
+            };
+
+            //注册回调事件
+            root.GetReloadToken().RegisterChangeCallback(run, null);
+
+            //触发回调：ConfigurationRoot 重新加载
+            root.Reload();
+
+            //等待一会，监控到文件变化后会执行回调方法
+            Thread.Sleep(500);
+
+            //回调执行过
+            Assert.True(excuted);
+        }
+
+        /// <summary>
+        /// 触发同步事件
+        /// 修改物理文件内容
+        /// </summary>
+        [Fact]
+        public void SyncConfigFor_ChangeFile_Test()
+        {
+            var filePath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Configs/appsettings.json");
+
+            var root = new ConfigurationBuilder()
+                .AddJsonFile(filePath, false, true)
+                .Build();
+
+            bool excuted = false;
+            Action<object?> run = (obj) => // 执行事件
+            {
+                excuted = true;
+                var configJsonText = System.Text.Json.JsonSerializer.Serialize(root.Get<AppOption>());
+                testOutput?.WriteLine(configJsonText);
+            };
+
+            //注册回调事件
+            root.GetReloadToken().RegisterChangeCallback(run, null);
+
+            //触发回调：修改配置源文件的内容
+            File.AppendAllText(filePath, " ");
+
+            //等待一会，监控到文件变化后会执行回调方法
+            Thread.Sleep(500);
+
+            //回调执行过
+            Assert.True(excuted);
+        }
+
+        public void Dispose()
+        {
+
+        }
+    }
+}
diff --git a/OptionStudy.Next/OptionStudy.Next.csproj b/OptionStudy.Next/OptionStudy.Next.csproj
index e70c8d7..9fa8b26 100644
--- a/OptionStudy.Next/OptionStudy.Next.csproj
+++ b/OptionStudy.Next/OptionStudy.Next.csproj
@@ -61,7 +61,6 @@
 
   <ItemGroup>
     <Folder Include="5多样性配置源\" />
-    <Folder Include="4配置同步\" />
   </ItemGroup>
 
 </Project>