--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Implab/ExceptionHelpers.cs	Tue Jan 30 01:37:17 2018 +0300
@@ -0,0 +1,18 @@
+using System;
+using System.Reflection;
+using System.Runtime.ExceptionServices;
+
+namespace Implab {
+    public static class ExceptionHelpers {
+        public static void Rethrow(this Exception that) {
+            ExceptionDispatchInfo.Capture(that).Throw();
+        }
+
+        public static void ThrowInvocationException(this Exception that) {
+            if (that is OperationCanceledException)
+                throw new OperationCanceledException("Operation cancelled", that);
+            else
+                throw new TargetInvocationException(that);
+        }
+    }
+}
\ No newline at end of file