From 93a5a58b884893f7aa21f735515c4c3e648cc453 Mon Sep 17 00:00:00 2001
From: filzrev <103790468+filzrev@users.noreply.github.com>
Date: Tue, 25 Jun 2024 12:49:36 +0900
Subject: [PATCH] fix: `docfx metadata` command throw `ArgumentException` when
 referencing empty namespace by doc comment (#10023)

fix: exception occurred when doc comment referencing empty namespace
---
 .../ManagedReference/Resolvers/YamlMetadataResolver.cs | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/Docfx.Dotnet/ManagedReference/Resolvers/YamlMetadataResolver.cs b/src/Docfx.Dotnet/ManagedReference/Resolvers/YamlMetadataResolver.cs
index 9651d9770bb..cf16ac67b3d 100644
--- a/src/Docfx.Dotnet/ManagedReference/Resolvers/YamlMetadataResolver.cs
+++ b/src/Docfx.Dotnet/ManagedReference/Resolvers/YamlMetadataResolver.cs
@@ -102,7 +102,7 @@ private static MetadataItem GenerateNestedTocStructure(IEnumerable<KeyValuePair<
                         };
                         missingNamespace.DisplayNames.Add(SyntaxLanguage.Default, partialParentNamespace);
                         namespacedItems[partialParentNamespace] = missingNamespace;
-                        allReferences.Add(partialParentNamespace, new());
+                        allReferences.TryAdd(partialParentNamespace, new());
 
                         if (!partialParentNamespace.Contains('.'))
                         {
@@ -137,11 +137,19 @@ private static MetadataItem GenerateNestedTocStructure(IEnumerable<KeyValuePair<
         }
 
         foreach (var member in namespacedItems.Values)
+        {
             member.Items = member.Items
                 .OrderBy(x => x.Type == MemberType.Namespace ? 0 : 1)
                 .ThenBy(x => x.Name)
                 .ToList();
 
+            if (member.Type == MemberType.Namespace
+             && member.Items.All(x => x.Type == MemberType.Namespace))
+            {
+                allReferences[member.Name] = new();
+            }
+        }
+
         return root;
     }