1 files changed, 22 insertions, 0 deletions

diff --git a/src/api/burn/WixToolset.BootstrapperApplicationApi/IBootstrapperApplicationFactory.cs b/src/api/burn/WixToolset.BootstrapperApplicationApi/IBootstrapperApplicationFactory.cs
new file mode 100644
index 00000000..ac90c0b7
--- /dev/null
+++ b/src/api/burn/WixToolset.BootstrapperApplicationApi/IBootstrapperApplicationFactory.cs
@@ -0,0 +1,22 @@
+// 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.BootstrapperApplicationApi
+{
+    using System;
+    using System.CodeDom.Compiler;
+    using System.Runtime.InteropServices;
+
+    /// <summary>
+    /// This is no longer used.
+    /// </summary>
+    [Obsolete("Bootstrapper applications now run out of proc and do not use a BootstrapperApplicationFactory. Remove your BootstrapperApplicationFactory class. See https://wixtoolset.org/docs/fiveforfour/ for more details.")]
+    public interface IBootstrapperApplicationFactory
+    {
+        /// <summary>
+        /// This is no longer used.
+        /// </summary>
+        /// <param name="pArgs">This is no longer used.</param>
+        /// <param name="pResults">This is no longer used.</param>
+        void Create(IntPtr pArgs, IntPtr pResults);
+    }
+}