1 files changed, 43 insertions, 0 deletions

diff --git a/src/WixToolset.Core/Preprocess/ProcessedStreamEventHandler.cs b/src/WixToolset.Core/Preprocess/ProcessedStreamEventHandler.cs
new file mode 100644
index 00000000..434590d2
--- /dev/null
+++ b/src/WixToolset.Core/Preprocess/ProcessedStreamEventHandler.cs
@@ -0,0 +1,43 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Core.Preprocess
+{
+    using System;
+    using System.Xml.Linq;
+
+    /// <summary>
+    /// Preprocessed output stream event handler delegate.
+    /// </summary>
+    /// <param name="sender">Sender of the message.</param>
+    /// <param name="ea">Arguments for the preprocessed stream event.</param>
+    public delegate void ProcessedStreamEventHandler(object sender, ProcessedStreamEventArgs e);
+
+    /// <summary>
+    /// Event args for preprocessed stream event.
+    /// </summary>
+    public class ProcessedStreamEventArgs : EventArgs
+    {
+        /// <summary>
+        /// Creates a new ProcessedStreamEventArgs.
+        /// </summary>
+        /// <param name="sourceFile">Source file that is preprocessed.</param>
+        /// <param name="document">Preprocessed output document.</param>
+        public ProcessedStreamEventArgs(string sourceFile, XDocument document)
+        {
+            this.SourceFile = sourceFile;
+            this.Document = document;
+        }
+
+        /// <summary>
+        /// Gets the full path of the source file.
+        /// </summary>
+        /// <value>The full path of the source file.</value>
+        public string SourceFile { get; private set; }
+
+        /// <summary>
+        /// Gets the preprocessed output stream.
+        /// </summary>
+        /// <value>The the preprocessed output stream.</value>
+        public XDocument Document { get; private set; }
+    }
+}