From 60d26403d873d544f3c41c6e1594e09c47fb5e4d Mon Sep 17 00:00:00 2001
From: Vincent Biret <vibiret@microsoft.com>
Date: Wed, 10 Jan 2024 08:57:29 -0500
Subject: [PATCH] - makes exception more explicit when inserting duplicated
 tree nodes

---
 src/Microsoft.OpenApi/Services/OpenApiUrlTreeNode.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Microsoft.OpenApi/Services/OpenApiUrlTreeNode.cs b/src/Microsoft.OpenApi/Services/OpenApiUrlTreeNode.cs
index 9ad9158ea..53a79c8a4 100644
--- a/src/Microsoft.OpenApi/Services/OpenApiUrlTreeNode.cs
+++ b/src/Microsoft.OpenApi/Services/OpenApiUrlTreeNode.cs
@@ -175,7 +175,7 @@ private OpenApiUrlTreeNode Attach(IEnumerable<string> segments,
             {
                 if (PathItems.ContainsKey(label))
                 {
-                    throw new ArgumentException("A duplicate label already exists for this node.", nameof(label));
+                    throw new ArgumentException($"A duplicate label already exists for this node: {label}", nameof(label));
                 }
 
                 Path = currentPath;