1 files changed, 31 insertions, 0 deletions

diff --git a/src/api/burn/WixToolset.BootstrapperApplicationApi/BootstrapperApplicationFactoryAttribute.cs b/src/api/burn/WixToolset.BootstrapperApplicationApi/BootstrapperApplicationFactoryAttribute.cs
new file mode 100644
index 00000000..9b64e838
--- /dev/null
+++ b/src/api/burn/WixToolset.BootstrapperApplicationApi/BootstrapperApplicationFactoryAttribute.cs
@@ -0,0 +1,31 @@
+// 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;
+
+    /// <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.")]
+    [AttributeUsage(AttributeTargets.Assembly, AllowMultiple = false)]
+    public sealed class BootstrapperApplicationFactoryAttribute : Attribute
+    {
+        /// <summary>
+        /// This is no longer used.
+        /// </summary>
+        /// <param name="bootstrapperApplicationFactoryType">This is no longer used</param>
+        public BootstrapperApplicationFactoryAttribute(Type bootstrapperApplicationFactoryType)
+        {
+            throw new NotImplementedException();
+        }
+
+        /// <summary>
+        /// This is no longer used.
+        /// </summary>
+        public Type BootstrapperApplicationFactoryType
+        {
+            get { throw new NotImplementedException(); }
+        }
+    }
+}