diff --git a/Implab/Components/Disposable.cs b/Implab/Components/Disposable.cs
--- a/Implab/Components/Disposable.cs
+++ b/Implab/Components/Disposable.cs
@@ -8,7 +8,7 @@ namespace Implab.Components {
     /// Base class the objects which support disposing.
     /// </summary>
     public class Disposable : IDisposable {
-        
+
         int m_disposed;
 
         public event EventHandler Disposed;
@@ -75,11 +75,9 @@ namespace Implab.Components {
         /// из нескольких потоков.
         /// </remarks>
         protected virtual void Dispose(bool disposing) {
-            if (disposing) {
-                EventHandler temp = Disposed;
-                if (temp != null)
-                    temp(this, EventArgs.Empty);
-            }
+            if (disposing)
+                Disposed.DispatchEvent(this, EventArgs.Empty);
+
         }
 
         [SuppressMessage("Microsoft.Design", "CA1063:ImplementIDisposableCorrectly", Justification = "Dipose(bool) and GC.SuppessFinalize are called")]
diff --git a/Implab/Safe.cs b/Implab/Safe.cs
--- a/Implab/Safe.cs
+++ b/Implab/Safe.cs
@@ -6,6 +6,10 @@ using System.Text.RegularExpressions;
 using System.Diagnostics;
 using System.Collections;
 
+#if NET_4_5
+using System.Threading.Tasks;
+#endif
+
 namespace Implab
 {
     public static class Safe
@@ -117,6 +121,9 @@ namespace Implab
             }
         }
 
+        public static void NoWait(IPromise promise) {
+        }
+
         [DebuggerStepThrough]
         public static IPromise<T> Run<T>(Func<IPromise<T>> action) {
             ArgumentNotNull(action, "action");
@@ -128,5 +135,10 @@ namespace Implab
             }
         }
 
+#if NET_4_5
+        public static void NoWait(Task t) {
+        }
+#endif
+
     }
 }