diff --git a/Assets/YooAsset/Samples~/Extension Sample/Runtime/CompatibleOldVersion.cs b/Assets/YooAsset/Samples~/Extension Sample/Runtime/CompatibleOldVersion.cs
new file mode 100644
index 00000000..545bb647
--- /dev/null
+++ b/Assets/YooAsset/Samples~/Extension Sample/Runtime/CompatibleOldVersion.cs	
@@ -0,0 +1,274 @@
+using YooAsset;
+
+#region InitializeParameters
+/// <summary>
+/// 初始化参数
+/// </summary>
+public abstract class InitializeParameters
+{
+    /// <summary>
+    /// 同时加载Bundle文件的最大并发数
+    /// </summary>
+    public int BundleLoadingMaxConcurrency = int.MaxValue;
+
+    /// <summary>
+    /// 当资源引用计数为零的时候自动释放资源包
+    /// </summary>
+    public bool AutoUnloadBundleWhenUnused = false;
+
+    /// <summary>
+    /// WebGL平台强制同步加载资源对象
+    /// </summary>
+    public bool WebGLForceSyncLoadAsset = false;
+}
+
+/// <summary>
+/// 编辑器下模拟运行模式的初始化参数
+/// </summary>
+public class EditorSimulateModeParameters : InitializeParameters
+{
+    public FileSystemParameters EditorFileSystemParameters;
+}
+
+/// <summary>
+/// 离线运行模式的初始化参数
+/// </summary>
+public class OfflinePlayModeParameters : InitializeParameters
+{
+    public FileSystemParameters BuildinFileSystemParameters;
+}
+
+/// <summary>
+/// 联机运行模式的初始化参数
+/// </summary>
+public class HostPlayModeParameters : InitializeParameters
+{
+    public FileSystemParameters BuildinFileSystemParameters;
+    public FileSystemParameters CacheFileSystemParameters;
+}
+
+/// <summary>
+/// WebGL运行模式的初始化参数
+/// </summary>
+public class WebPlayModeParameters : InitializeParameters
+{
+    public FileSystemParameters WebServerFileSystemParameters;
+    public FileSystemParameters WebRemoteFileSystemParameters;
+}
+#endregion
+
+#region InitializationOperation
+public class InitializationOperation : AsyncOperationBase
+{
+    private bool _isDone = false;
+    private readonly InitializePackageOperation _operation;
+
+    internal InitializationOperation(InitializePackageOperation op)
+    {
+        _operation = op;
+    }
+    internal override void InternalStart()
+    {
+    }
+    internal override void InternalUpdate()
+    {
+        if (_isDone)
+            return;
+
+        _operation.UpdateOperation();
+        if (_operation.IsDone == false)
+            return;
+
+        _isDone = true;
+        Status = _operation.Status;
+        Error = _operation.Error;
+    }
+}
+#endregion
+
+#region DestroyOperation
+public class DestroyOperation : AsyncOperationBase
+{
+    private bool _isDone = false;
+    private readonly DestroyPackageOperation _operation;
+
+    internal DestroyOperation(DestroyPackageOperation op)
+    {
+        _operation = op;
+    }
+    internal override void InternalStart()
+    {
+    }
+    internal override void InternalUpdate()
+    {
+        if (_isDone)
+            return;
+
+        _operation.UpdateOperation();
+        if (_operation.IsDone == false)
+            return;
+
+        _isDone = true;
+        Status = _operation.Status;
+        Error = _operation.Error;
+    }
+}
+#endregion
+
+#region UpdatePackageManifestOperation
+public class UpdatePackageManifestOperation : AsyncOperationBase
+{
+    private bool _isDone = false;
+    private readonly LoadPackageManifestOperation _operation;
+
+    internal UpdatePackageManifestOperation(LoadPackageManifestOperation op)
+    {
+        _operation = op;
+    }
+    internal override void InternalStart()
+    {
+    }
+    internal override void InternalUpdate()
+    {
+        if (_isDone)
+            return;
+
+        _operation.UpdateOperation();
+        if (_operation.IsDone == false)
+            return;
+
+        _isDone = true;
+        Status = _operation.Status;
+        Error = _operation.Error;
+    }
+}
+#endregion
+
+public static class CompatibleOldVersion
+{
+    /// <summary>
+    /// 兼容Yoo2版本
+    /// </summary>
+    public static InitializationOperation InitializeAsync(this ResourcePackage package, InitializeParameters parameters)
+    {
+        if (parameters is EditorSimulateModeParameters)
+        {
+            var initializeParameters = parameters as EditorSimulateModeParameters;
+            var options = new EditorSimulateModeOptions();
+            options.BundleLoadingMaxConcurrency = initializeParameters.BundleLoadingMaxConcurrency;
+            options.AutoUnloadBundleWhenUnused = initializeParameters.AutoUnloadBundleWhenUnused;
+            options.WebGLForceSyncLoadAsset = initializeParameters.WebGLForceSyncLoadAsset;
+            options.EditorFileSystemParameters = initializeParameters.EditorFileSystemParameters;
+            var operation = package.InitializePackageAsync(options);
+            var wrapper = new InitializationOperation(operation);
+            OperationSystem.StartOperation(package.PackageName, wrapper);
+            return wrapper;
+        }
+        else if (parameters is OfflinePlayModeParameters)
+        {
+            var initializeParameters = parameters as OfflinePlayModeParameters;
+            var options = new OfflinePlayModeOptions();
+            options.BundleLoadingMaxConcurrency = initializeParameters.BundleLoadingMaxConcurrency;
+            options.AutoUnloadBundleWhenUnused = initializeParameters.AutoUnloadBundleWhenUnused;
+            options.WebGLForceSyncLoadAsset = initializeParameters.WebGLForceSyncLoadAsset;
+            options.BuildinFileSystemParameters = initializeParameters.BuildinFileSystemParameters;
+            var operation = package.InitializePackageAsync(options);
+            var wrapper = new InitializationOperation(operation);
+            OperationSystem.StartOperation(package.PackageName, wrapper);
+            return wrapper;
+        }
+        else if (parameters is HostPlayModeParameters)
+        {
+            var initializeParameters = parameters as HostPlayModeParameters;
+            var options = new HostPlayModeOptions();
+            options.BundleLoadingMaxConcurrency = initializeParameters.BundleLoadingMaxConcurrency;
+            options.AutoUnloadBundleWhenUnused = initializeParameters.AutoUnloadBundleWhenUnused;
+            options.WebGLForceSyncLoadAsset = initializeParameters.WebGLForceSyncLoadAsset;
+            options.BuildinFileSystemParameters = initializeParameters.BuildinFileSystemParameters;
+            options.CacheFileSystemParameters = initializeParameters.CacheFileSystemParameters;
+            var operation = package.InitializePackageAsync(options);
+            var wrapper = new InitializationOperation(operation);
+            OperationSystem.StartOperation(package.PackageName, wrapper);
+            return wrapper;
+        }
+        else if (parameters is WebPlayModeParameters)
+        {
+            var initializeParameters = parameters as WebPlayModeParameters;
+            var options = new WebPlayModeOptions();
+            options.BundleLoadingMaxConcurrency = initializeParameters.BundleLoadingMaxConcurrency;
+            options.AutoUnloadBundleWhenUnused = initializeParameters.AutoUnloadBundleWhenUnused;
+            options.WebGLForceSyncLoadAsset = initializeParameters.WebGLForceSyncLoadAsset;
+            options.WebServerFileSystemParameters = initializeParameters.WebServerFileSystemParameters;
+            options.WebRemoteFileSystemParameters = initializeParameters.WebRemoteFileSystemParameters;
+            var operation = package.InitializePackageAsync(options);
+            var wrapper = new InitializationOperation(operation);
+            OperationSystem.StartOperation(package.PackageName, wrapper);
+            return wrapper;
+        }
+        else
+        {
+            throw new System.NotImplementedException();
+        }
+    }
+
+    /// <summary>
+    /// 兼容Yoo2版本
+    /// </summary>
+    public static DestroyOperation DestroyAsync(this ResourcePackage package)
+    {
+        var operation = package.DestroyPackageAsync();
+        var wrapper = new DestroyOperation(operation);
+        OperationSystem.StartOperation(package.PackageName, wrapper);
+        return wrapper;
+    }
+    
+    /// <summary>
+    /// 兼容Yoo2版本
+    /// </summary>
+    public static RequestPackageVersionOperation RequestPackageVersionAsync(this ResourcePackage package, bool appendTimeTicks = true, int timeout = 60)
+    {
+        var options = new RequestPackageVersionOptions(appendTimeTicks, timeout);
+        var operation = package.RequestPackageVersionAsync(options);
+        return operation;
+    }
+
+    /// <summary>
+    /// 兼容Yoo2版本
+    /// </summary>
+    public static UpdatePackageManifestOperation UpdatePackageManifestAsync(this ResourcePackage package, string packageVersion, int timeout = 60)
+    {
+        var options = new LoadPackageManifestOptions(packageVersion, timeout);
+        var operation = package.LoadPackageManifestAsync(options);
+        var wrapper = new UpdatePackageManifestOperation(operation);
+        OperationSystem.StartOperation(package.PackageName, wrapper);
+        return wrapper;
+    }
+    
+    /// <summary>
+    /// 兼容Yoo2版本
+    /// </summary>
+    public static PreDownloadContentOperation PreDownloadContentAsync(this ResourcePackage package, string packageVersion, int timeout = 60)
+    {
+        var options = new PreDownloadContentOptions(packageVersion, timeout);
+        var operation = package.PreDownloadContentAsync(options);
+        return operation;
+    }
+
+    /// <summary>
+    /// 兼容Yoo2版本
+    /// </summary>
+    public static ClearCacheFilesOperation ClearCacheFilesAsync(this ResourcePackage package, EFileClearMode fileClearMode, object clearParam = null)
+    {
+        var options = new ClearCacheFilesOptions(fileClearMode, clearParam);
+        return package.ClearCacheFilesAsync(options);
+    }
+
+    /// <summary>
+    /// 兼容Yoo2版本
+    /// </summary>
+    public static ClearCacheFilesOperation ClearCacheFilesAsync(this ResourcePackage package, string fileClearMode, object clearParam = null)
+    {
+        var options = new ClearCacheFilesOptions(fileClearMode, clearParam);
+        return package.ClearCacheFilesAsync(options);
+    }
+}
\ No newline at end of file
diff --git a/Assets/YooAsset/Samples~/Extension Sample/Runtime/CompatibleOldVersion.cs.meta b/Assets/YooAsset/Samples~/Extension Sample/Runtime/CompatibleOldVersion.cs.meta
new file mode 100644
index 00000000..466e4d35
--- /dev/null
+++ b/Assets/YooAsset/Samples~/Extension Sample/Runtime/CompatibleOldVersion.cs.meta	
@@ -0,0 +1,11 @@
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+guid: b974d3d744622f3499d026f99074cd72
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
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