diff --git a/src/UniTask/Assets/Plugins/UniTask/Runtime/CancellationTokenExtensions.cs b/src/UniTask/Assets/Plugins/UniTask/Runtime/CancellationTokenExtensions.cs
index e87721f..ba3bd22 100644
--- a/src/UniTask/Assets/Plugins/UniTask/Runtime/CancellationTokenExtensions.cs
+++ b/src/UniTask/Assets/Plugins/UniTask/Runtime/CancellationTokenExtensions.cs
@@ -9,6 +9,7 @@ namespace Cysharp.Threading.Tasks
     public static class CancellationTokenExtensions
     {
         static readonly Action<object> cancellationTokenCallback = Callback;
+        static readonly Action<object> disposeCallback = DisposeCallback;
 
         public static (UniTask, CancellationTokenRegistration) ToUniTask(this CancellationToken cancellationToken)
         {
@@ -75,6 +76,17 @@ namespace Cysharp.Threading.Tasks
                 }
             }
         }
+
+        public static CancellationTokenRegistration AddTo(this IDisposable disposable, CancellationToken cancellationToken)
+        {
+            return cancellationToken.RegisterWithoutCaptureExecutionContext(disposeCallback, disposable);
+        }
+
+        static void DisposeCallback(object state)
+        {
+            var d = (IDisposable)state;
+            d.Dispose();
+        }
     }
 
     public struct CancellationTokenAwaitable
diff --git a/src/UniTask/Assets/Scenes/SandboxMain.cs b/src/UniTask/Assets/Scenes/SandboxMain.cs
index 97a33cc..97fb801 100644
--- a/src/UniTask/Assets/Scenes/SandboxMain.cs
+++ b/src/UniTask/Assets/Scenes/SandboxMain.cs
@@ -429,7 +429,9 @@ public class SandboxMain : MonoBehaviour
 
     void Start()
     {
-        PlayerLoopInfo.Inject();
+        UnityEngine.Debug.Log("Start:" + PlayerLoopInfo.CurrentLoopType);
+
+        //PlayerLoopInfo.Inject();
 
         //_ = AsyncFixedUpdate();
         //StartCoroutine(CoroutineFixedUpdate());
@@ -438,8 +440,11 @@ public class SandboxMain : MonoBehaviour
 
         // Application.logMessageReceived += Application_logMessageReceived;
 
+        // var rp = new AsyncReactiveProperty<int>();
 
 
+        // rp.AddTo(this.GetCancellationTokenOnDestroy());
+
 
 
 
@@ -969,6 +974,7 @@ public class PlayerLoopInfo
 
     public static Type CurrentLoopType { get; private set; }
 
+    [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
     public static void Inject()
     {
         var system = PlayerLoop.GetCurrentPlayerLoop();