2 files changed, 81 insertions, 0 deletions

diff --git a/src/wix/WixToolset.Converters/WixConverter.cs b/src/wix/WixToolset.Converters/WixConverter.cs
index 2f00d15d..3b8966cb 100644
--- a/src/wix/WixToolset.Converters/WixConverter.cs
+++ b/src/wix/WixToolset.Converters/WixConverter.cs
@@ -115,6 +115,7 @@ namespace WixToolset.Converters
         private static readonly XName RequiresElementName = WixNamespace + "Requires";
         private static readonly XName RequiresRefElementName = WixNamespace + "RequiresRef";
         private static readonly XName MultiStringValueElementName = WixNamespace + "MultiStringValue";
+        private static readonly XName RelatedBundleElementName = WixNamespace + "RelatedBundle";
         private static readonly XName RemotePayloadElementName = WixNamespace + "RemotePayload";
         private static readonly XName RegistryKeyElementName = WixNamespace + "RegistryKey";
         private static readonly XName RegistrySearchElementName = WixNamespace + "RegistrySearch";
@@ -313,6 +314,7 @@ namespace WixToolset.Converters
                 { WixConverter.MultiStringValueElementName, this.ConvertMultiStringValueElement },
                 { WixConverter.RegistryKeyElementName, this.ConvertRegistryKeyElement },
                 { WixConverter.RegistrySearchElementName, this.ConvertRegistrySearchElement },
+                { WixConverter.RelatedBundleElementName, this.ConvertRelatedBundleElement },
                 { WixConverter.RemotePayloadElementName, this.ConvertRemotePayloadElement },
                 { WixConverter.RequiredPrivilegeElementName, this.ConvertRequiredPrivilegeElement },
                 { WixConverter.CustomActionRefElementName, this.ConvertCustomActionRefElement },
@@ -1713,6 +1715,19 @@ namespace WixToolset.Converters
             }
         }
 
+        private void ConvertRelatedBundleElement(XElement element)
+        {
+            var xAction = element.Attribute("Action");
+            var value = xAction?.Value;
+            var lowercaseValue = value?.ToLowerInvariant();
+
+            if (value != lowercaseValue
+                && this.OnInformation(ConverterTestType.RelatedBundleActionLowercase, element, "The RelatedBundle element's Action attribute value must now be all lowercase. The Action='{0}' will be converted to '{1}'", value, lowercaseValue))
+            {
+                xAction.Value = lowercaseValue;
+            }
+        }
+
         private void ConvertRemotePayloadElement(XElement element)
         {
             var xParent = element.Parent;
@@ -3303,6 +3318,11 @@ namespace WixToolset.Converters
             ///  The Certificate BinaryKey element has been renamed to BinaryRef.
             /// </summary>
             CertificateBinaryKeyIsNowBinaryRef,
+
+            /// <summary>
+            /// The RelatedBundle element's Action attribute value must now be all lowercase. The Action='{0}' will be converted to '{1}'
+            /// </summary>
+            RelatedBundleActionLowercase,
         }
     }
 }
diff --git a/src/wix/test/WixToolsetTest.Converters/RelatedBundleFixture.cs b/src/wix/test/WixToolsetTest.Converters/RelatedBundleFixture.cs
new file mode 100644
index 00000000..ea0be80b
--- /dev/null
+++ b/src/wix/test/WixToolsetTest.Converters/RelatedBundleFixture.cs
@@ -0,0 +1,61 @@
+// 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 WixToolsetTest.Converters
+{
+    using System;
+    using System.Linq;
+    using System.Xml.Linq;
+    using WixInternal.TestSupport;
+    using WixToolset.Converters;
+    using WixToolsetTest.Converters.Mocks;
+    using Xunit;
+
+    public class RelatedBundleFixture : BaseConverterFixture
+    {
+        [Fact]
+        public void CanConvertActionToLowercase()
+        {
+            var parse = String.Join(Environment.NewLine,
+                "<Wix xmlns='http://wixtoolset.org/schemas/v4/wxs'>",
+                "  <Fragment>",
+                "    <RelatedBundle Id='D' Action='Detect' />",
+                "    <RelatedBundle Id='U' Action='Upgrade' />",
+                "    <RelatedBundle Id='A' Action='Addon' />",
+                "    <RelatedBundle Id='P' Action='Patch' />",
+                "  </Fragment>",
+                "</Wix>");
+
+            var expected = new[]
+            {
+                "<Wix xmlns=\"http://wixtoolset.org/schemas/v4/wxs\">",
+                "  <Fragment>",
+                "    <RelatedBundle Id=\"D\" Action=\"detect\" />",
+                "    <RelatedBundle Id=\"U\" Action=\"upgrade\" />",
+                "    <RelatedBundle Id=\"A\" Action=\"addon\" />",
+                "    <RelatedBundle Id=\"P\" Action=\"patch\" />",
+                "  </Fragment>",
+                "</Wix>"
+            };
+
+            var document = XDocument.Parse(parse, LoadOptions.PreserveWhitespace | LoadOptions.SetLineInfo);
+
+            var messaging = new MockMessaging();
+            var converter = new WixConverter(messaging, 2, null, null);
+
+            var errors = converter.ConvertDocument(document);
+
+            var actualLines = UnformattedDocumentLines(document);
+            WixAssert.CompareLineByLine(expected, actualLines);
+
+            WixAssert.CompareLineByLine(new[]
+            {
+                "[Converted] The RelatedBundle element's Action attribute value must now be all lowercase. The Action='Detect' will be converted to 'detect' (RelatedBundleActionLowercase)",
+                "[Converted] The RelatedBundle element's Action attribute value must now be all lowercase. The Action='Upgrade' will be converted to 'upgrade' (RelatedBundleActionLowercase)",
+                "[Converted] The RelatedBundle element's Action attribute value must now be all lowercase. The Action='Addon' will be converted to 'addon' (RelatedBundleActionLowercase)",
+                "[Converted] The RelatedBundle element's Action attribute value must now be all lowercase. The Action='Patch' will be converted to 'patch' (RelatedBundleActionLowercase)",
+            }, messaging.Messages.Select(m => m.ToString()).ToArray());
+
+            Assert.Equal(4, errors);
+        }
+    }
+}