--- a/Implab/PromiseExtensions.cs	Wed Nov 05 16:39:56 2014 +0300
+++ b/Implab/PromiseExtensions.cs	Thu Nov 06 20:03:19 2014 +0300
@@ -12,7 +12,7 @@
             if (context == null)
                 return that;
 
-            var p = new SyncContextPromise<T>(context, that, true);
+            var p = new SyncContextPromise<T>(context, that);
 
             that.Last(
                 p.Resolve,
@@ -26,7 +26,7 @@
             Safe.ArgumentNotNull(that, "that");
             Safe.ArgumentNotNull(context, "context");
 
-            var p = new SyncContextPromise<T>(context, that, true);
+            var p = new SyncContextPromise<T>(context, that);
 
             that.Last(
                 p.Resolve,
@@ -36,6 +36,24 @@
             return p;
         }
 
+        /// <summary>
+        /// Ensures the dispatched.
+        /// </summary>
+        /// <returns>The dispatched.</returns>
+        /// <param name="that">That.</param>
+        /// <param name="head">Head.</param>
+        /// <param name="cleanup">Cleanup.</param>
+        /// <typeparam name="TPromise">The 1st type parameter.</typeparam>
+        /// <typeparam name="T">The 2nd type parameter.</typeparam>
+        public static TPromise EnsureDispatched<TPromise,T>(this TPromise that, IPromise<T> head, Action<T> cleanup) where TPromise : IPromise{
+            Safe.ArgumentNotNull(that, "that");
+            Safe.ArgumentNotNull(head, "head");
+
+            that.Last(null,null,() => head.Last(cleanup));
+
+            return that;
+        }
+
         public static AsyncCallback AsyncCallback<T>(this Promise<T> that, Func<IAsyncResult,T> callback) {
             Safe.ArgumentNotNull(that, "that");
             Safe.ArgumentNotNull(callback, "callback");