From 90f9208053d30b90bb7fdcc2a38de2415088db7c Mon Sep 17 00:00:00 2001
From: norareidy <nora.reidy@mongodb.com>
Date: Tue, 11 Mar 2025 13:36:43 -0400
Subject: [PATCH 1/3] Set() stage builder

---
 source/fundamentals/builders.txt | 37 ++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/source/fundamentals/builders.txt b/source/fundamentals/builders.txt
index 0f2cdcc5..76fbef56 100644
--- a/source/fundamentals/builders.txt
+++ b/source/fundamentals/builders.txt
@@ -364,6 +364,43 @@ as a ``BsonDocument`` to the `AppendStage() method
 To learn more about the Aggregation Pipeline, see the
 :manual:`Aggregation Pipeline </core/aggregation-pipeline/>` server manual page.
 
+.. _csharp-builders-set:
+
+Add Fields to Collection Documents
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+You can add new fields to existing documents in a collection 
+by creating a ``$set`` stage in your aggregation pipeline. To
+create a ``$set`` stage, call the ``Set()`` method on a
+``PipelineStageDefinitionBuilder`` object. 
+
+.. tip::
+
+   To learn more about the $set stage, see :manual:`$set </reference/operator/aggregation/set/>`
+   in the {+mdb-server+} manual.
+
+This example builds an aggregation pipeline that performs the following
+actions:
+
+- Matches all documents that have a ``Name`` field value of ``"Daffodil"``
+- Adds a ``Color`` field to matching documents and sets its value to
+  ``"Yellow"``
+
+.. code-block:: csharp
+
+   var matchFilter = Builders<Flower>.Filter.Eq(f => f.Name, "Daffodil");
+   var fields = Builders<Flower>.SetFields.Set("Color", "Yellow");
+
+   var pipeline = new EmptyPipelineDefinition<Flower>()
+      .Match(matchFilter)
+      .Set(fields);
+
+The preceding example creates the following pipeline:
+
+.. code-block:: json
+   
+   [{ "$match" : { "Name" : "Daffodil" } }, { "$set" : { "Color" : "Yellow"} }]
+
 .. _csharp-builders-out:
 
 Write Pipeline Results to a Collection

From 870787f1406f931ef1bd185b0ec5fd86ad294a57 Mon Sep 17 00:00:00 2001
From: norareidy <nora.reidy@mongodb.com>
Date: Wed, 2 Apr 2025 10:05:43 -0400
Subject: [PATCH 2/3] color property

---
 source/includes/fundamentals/code-examples/builders.cs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/source/includes/fundamentals/code-examples/builders.cs b/source/includes/fundamentals/code-examples/builders.cs
index f4942aa1..aa14ea26 100644
--- a/source/includes/fundamentals/code-examples/builders.cs
+++ b/source/includes/fundamentals/code-examples/builders.cs
@@ -61,5 +61,6 @@ public class Flower
     public List<string> Season { get; set; }
     public double Stock { get; set; }
     public string Description { get; set; }
+    public string Color { get; set; }
 }
 // end-model
\ No newline at end of file

From 2a4bf2e3486b28d53f2a5cda67e7fb3e63d4bf45 Mon Sep 17 00:00:00 2001
From: norareidy <nora.reidy@mongodb.com>
Date: Thu, 10 Apr 2025 09:57:36 -0400
Subject: [PATCH 3/3] RS feedback 2

---
 source/fundamentals/builders.txt | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/source/fundamentals/builders.txt b/source/fundamentals/builders.txt
index 76fbef56..23f477f0 100644
--- a/source/fundamentals/builders.txt
+++ b/source/fundamentals/builders.txt
@@ -366,13 +366,12 @@ To learn more about the Aggregation Pipeline, see the
 
 .. _csharp-builders-set:
 
-Add Fields to Collection Documents
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Add Fields to Documents
+~~~~~~~~~~~~~~~~~~~~~~~
 
-You can add new fields to existing documents in a collection 
-by creating a ``$set`` stage in your aggregation pipeline. To
-create a ``$set`` stage, call the ``Set()`` method on a
-``PipelineStageDefinitionBuilder`` object. 
+You can add new fields to documents by creating a ``$set`` stage in
+your aggregation pipeline. To create a ``$set`` stage, call the ``Set()``
+method on a ``PipelineStageDefinitionBuilder`` object. 
 
 .. tip::