diff --git a/src/activities/Elsa.Activities.File/Extensions/WorkflowRunnerExtensions.cs b/src/activities/Elsa.Activities.File/Extensions/WorkflowRunnerExtensions.cs
new file mode 100644
index 000000000..bef45fa6c
--- /dev/null
+++ b/src/activities/Elsa.Activities.File/Extensions/WorkflowRunnerExtensions.cs
@@ -0,0 +1,31 @@
+using Elsa.Activities.File.Bookmarks;
+using Elsa.Activities.File.Models;
+using Elsa.Dispatch;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Elsa.Activities.File.Extensions
+{
+    public static class WorkflowRunnerExtensions
+    {
+        const string _activityType = nameof(WatchDirectory);
+
+        public static async Task TriggerFileSystemChangedWorkflowsAsync(this IWorkflowDispatcher workflowDispatcher,
+            string directory,
+            WatcherChangeTypes changeType,
+            string fileName,
+            string fullPath,
+            CancellationToken cancellationToken = default)
+        {
+            var input = new FileSystemChanged(changeType, directory, fileName, fullPath);
+            var bookmark = new FileSystemChangedBookmark(changeType, directory);
+            var trigger = new FileSystemChangedBookmark(changeType, directory);
+            await workflowDispatcher.DispatchAsync(new TriggerWorkflowsRequest(_activityType, bookmark, trigger, input), cancellationToken);
+        }
+    }
+}