From ecbd7223bd2b73cd9228331d16bf201dd08318f4 Mon Sep 17 00:00:00 2001
From: copyleftproducts <124498382+copyleftproducts@users.noreply.github.com>
Date: Sun, 14 Dec 2025 22:03:24 +0100
Subject: [PATCH 1/2] Remove unused property from legacy document
 transformation Resolves #5303

---
 src/NSwag.Commands/NSwagDocumentBase.cs | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/src/NSwag.Commands/NSwagDocumentBase.cs b/src/NSwag.Commands/NSwagDocumentBase.cs
index 613e24710..f12626e84 100644
--- a/src/NSwag.Commands/NSwagDocumentBase.cs
+++ b/src/NSwag.Commands/NSwagDocumentBase.cs
@@ -513,12 +513,6 @@ private static string TransformLegacyDocument(string data, out bool saveFile)
                 saveFile = true;
             }
 
-            if (data.Contains("\"noBuild\":") && !data.Contains("RequireParametersWithoutDefault", StringComparison.OrdinalIgnoreCase))
-            {
-                data = data.Replace("\"noBuild\":", "\"requireParametersWithoutDefault\": true, \"noBuild\":");
-                saveFile = true;
-            }
-
             if (data.Contains("assemblyTypeToSwagger"))
             {
                 data = data.Replace("assemblyTypeToSwagger", "typesToSwagger");

From 971f973415854ae787dc5bd092830b0447f2a678 Mon Sep 17 00:00:00 2001
From: copyleftproducts <124498382+copyleftproducts@users.noreply.github.com>
Date: Sun, 14 Dec 2025 22:08:02 +0100
Subject: [PATCH 2/2] Do not overwrite legacy documents with transformations
 Resolves #1886

---
 src/NSwag.Commands/NSwagDocumentBase.cs | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/src/NSwag.Commands/NSwagDocumentBase.cs b/src/NSwag.Commands/NSwagDocumentBase.cs
index f12626e84..7606f6401 100644
--- a/src/NSwag.Commands/NSwagDocumentBase.cs
+++ b/src/NSwag.Commands/NSwagDocumentBase.cs
@@ -167,14 +167,7 @@ protected static async Task<TDocument> LoadAsync<TDocument>(
             where TDocument : NSwagDocumentBase, new()
         {
             var data = File.ReadAllText(filePath);
-            data = TransformLegacyDocument(data, out var requiredLegacyTransformations);
-
-            if (requiredLegacyTransformations)
-            {
-                // Save now to avoid transformations
-                var document = LoadDocument<TDocument>(filePath, data);
-                await document.SaveAsync();
-            }
+            data = TransformLegacyDocument(data, out var _);
 
             if (applyTransformations)
             {