diff --git a/source/includes/code-examples/GradeEntry.cs b/source/includes/code-examples/GradeEntry.cs
index 851ffb37..b9a4df2f 100644
--- a/source/includes/code-examples/GradeEntry.cs
+++ b/source/includes/code-examples/GradeEntry.cs
@@ -4,5 +4,5 @@ public class GradeEntry
 
     public string Grade { get; set; }
 
-    public float Score { get; set; }
+    public float? Score { get; set; }
 }
\ No newline at end of file
diff --git a/source/includes/code-examples/delete-many/DeleteMany.cs b/source/includes/code-examples/delete-many/DeleteMany.cs
index e26ec8da..fa0daafd 100644
--- a/source/includes/code-examples/delete-many/DeleteMany.cs
+++ b/source/includes/code-examples/delete-many/DeleteMany.cs
@@ -1,3 +1,7 @@
+// Deletes multiple documents from a collection by using the C# driver
+
+using MongoDB.Bson;
+using MongoDB.Bson.Serialization.Attributes;
 using MongoDB.Bson.Serialization.Conventions;
 using MongoDB.Driver;
 
@@ -92,5 +96,5 @@ public class GradeEntry
 
     public string Grade { get; set; }
 
-    public float Score { get; set; }
+    public float? Score { get; set; }
 }
diff --git a/source/includes/code-examples/delete-many/DeleteManyAsync.cs b/source/includes/code-examples/delete-many/DeleteManyAsync.cs
index da88a883..d9bee98f 100644
--- a/source/includes/code-examples/delete-many/DeleteManyAsync.cs
+++ b/source/includes/code-examples/delete-many/DeleteManyAsync.cs
@@ -1,3 +1,7 @@
+// Asynchronously deletes multiple documents from a collection by using the C# driver
+
+using MongoDB.Bson;
+using MongoDB.Bson.Serialization.Attributes;
 using MongoDB.Bson.Serialization.Conventions;
 using MongoDB.Driver;
 
@@ -24,8 +28,6 @@ public static async Task Main(string[] args)
         Console.WriteLine($"Deleted documents: {result.DeletedCount}");
 
         Restore(docs);
-
-        return result;
     }
 
     private static async Task<DeleteResult> DeleteMultipleRestaurantsBuilderAsync()
@@ -94,5 +96,5 @@ public class GradeEntry
 
     public string Grade { get; set; }
 
-    public float Score { get; set; }
+    public float? Score { get; set; }
 }
diff --git a/source/includes/code-examples/delete-one/DeleteOne.cs b/source/includes/code-examples/delete-one/DeleteOne.cs
index 85c7bf0a..c884bf2c 100644
--- a/source/includes/code-examples/delete-one/DeleteOne.cs
+++ b/source/includes/code-examples/delete-one/DeleteOne.cs
@@ -1,3 +1,7 @@
+// Deletes a document from a collection by using the C# driver
+
+using MongoDB.Bson;
+using MongoDB.Bson.Serialization.Attributes;
 using MongoDB.Bson.Serialization.Conventions;
 using MongoDB.Driver;
 
@@ -91,5 +95,5 @@ public class GradeEntry
 
     public string Grade { get; set; }
 
-    public float Score { get; set; }
+    public float? Score { get; set; }
 }
diff --git a/source/includes/code-examples/delete-one/DeleteOneAsync.cs b/source/includes/code-examples/delete-one/DeleteOneAsync.cs
index 6f5b2734..3426e3d8 100644
--- a/source/includes/code-examples/delete-one/DeleteOneAsync.cs
+++ b/source/includes/code-examples/delete-one/DeleteOneAsync.cs
@@ -1,3 +1,7 @@
+// Asynchronously deletes a document from a collection by using the C# driver
+
+using MongoDB.Bson;
+using MongoDB.Bson.Serialization.Attributes;
 using MongoDB.Bson.Serialization.Conventions;
 using MongoDB.Driver;
 
@@ -91,5 +95,5 @@ public class GradeEntry
 
     public string Grade { get; set; }
 
-    public float Score { get; set; }
+    public float? Score { get; set; }
 }
diff --git a/source/includes/code-examples/find-many/FindMany.cs b/source/includes/code-examples/find-many/FindMany.cs
index c7ff8926..69f032eb 100644
--- a/source/includes/code-examples/find-many/FindMany.cs
+++ b/source/includes/code-examples/find-many/FindMany.cs
@@ -1,4 +1,8 @@
+// Retrieves documents that match a query filter by using the C# driver
+
+using MongoDB.Bson;
 using MongoDB.Bson.Serialization.Conventions;
+using MongoDB.Bson.Serialization.Attributes;
 using MongoDB.Driver;
 
 namespace CSharpExamples.UsageExamples.FindMany;
@@ -111,5 +115,5 @@ public class GradeEntry
 
     public string Grade { get; set; }
 
-    public float Score { get; set; }
+    public float? Score { get; set; }
 }
diff --git a/source/includes/code-examples/find-many/FindManyAsync.cs b/source/includes/code-examples/find-many/FindManyAsync.cs
index 96150761..6cb1584e 100644
--- a/source/includes/code-examples/find-many/FindManyAsync.cs
+++ b/source/includes/code-examples/find-many/FindManyAsync.cs
@@ -1,4 +1,8 @@
+// Asynchronously retrieves documents that match a query filter by using the C# driver
+
+using MongoDB.Bson;
 using MongoDB.Bson.Serialization.Conventions;
+using MongoDB.Bson.Serialization.Attributes;
 using MongoDB.Driver;
 using MongoDB.Driver.Linq;
 
@@ -112,5 +116,5 @@ public class GradeEntry
 
     public string Grade { get; set; }
 
-    public float Score { get; set; }
+    public float? Score { get; set; }
 }
diff --git a/source/includes/code-examples/find-one/FindOne.cs b/source/includes/code-examples/find-one/FindOne.cs
index dfed8220..722c4e22 100644
--- a/source/includes/code-examples/find-one/FindOne.cs
+++ b/source/includes/code-examples/find-one/FindOne.cs
@@ -1,5 +1,6 @@
 using MongoDB.Bson;
 using MongoDB.Bson.Serialization.Conventions;
+using MongoDB.Bson.Serialization.Attributes;
 using MongoDB.Driver;
 
 namespace CSharpExamples.UsageExamples.FindOne;
@@ -97,5 +98,5 @@ public class GradeEntry
 
     public string Grade { get; set; }
 
-    public float Score { get; set; }
+    public float? Score { get; set; }
 }
diff --git a/source/includes/code-examples/find-one/FindOneAsync.cs b/source/includes/code-examples/find-one/FindOneAsync.cs
index 88d1b51b..98d3113f 100644
--- a/source/includes/code-examples/find-one/FindOneAsync.cs
+++ b/source/includes/code-examples/find-one/FindOneAsync.cs
@@ -1,5 +1,6 @@
 using MongoDB.Bson;
 using MongoDB.Bson.Serialization.Conventions;
+using MongoDB.Bson.Serialization.Attributes;
 using MongoDB.Driver;
 using MongoDB.Driver.Linq;
 
@@ -96,5 +97,5 @@ public class GradeEntry
 
     public string Grade { get; set; }
 
-    public float Score { get; set; }
+    public float? Score { get; set; }
 }
diff --git a/source/includes/code-examples/insert-many/InsertMany.cs b/source/includes/code-examples/insert-many/InsertMany.cs
index 427cbffe..64d070c5 100644
--- a/source/includes/code-examples/insert-many/InsertMany.cs
+++ b/source/includes/code-examples/insert-many/InsertMany.cs
@@ -1,5 +1,6 @@
 using MongoDB.Bson;
 using MongoDB.Bson.Serialization.Conventions;
+using MongoDB.Bson.Serialization.Attributes;
 using MongoDB.Driver;
 
 namespace CSharpExamples.UsageExamples.InsertMany;
@@ -71,10 +72,10 @@ private static List<Restaurant> GenerateDocuments()
                 Name = "Mongo's Pizza",
                 RestaurantId = $"12345-{i}",
                 Cuisine = "Pizza",
-                Address = new BsonDocument
+                Address = new()
                 {
-                    {"street", "Pizza St"},
-                    {"zipcode", "10003"}
+                    Street = "Pizza St",
+                    ZipCode = "10003"
                 },
                 Borough = "Manhattan",
             };
@@ -131,5 +132,5 @@ public class GradeEntry
 
     public string Grade { get; set; }
 
-    public float Score { get; set; }
+    public float? Score { get; set; }
 }
diff --git a/source/includes/code-examples/insert-many/InsertManyAsync.cs b/source/includes/code-examples/insert-many/InsertManyAsync.cs
index cc36e39f..8b67cdfd 100644
--- a/source/includes/code-examples/insert-many/InsertManyAsync.cs
+++ b/source/includes/code-examples/insert-many/InsertManyAsync.cs
@@ -1,5 +1,6 @@
 using MongoDB.Bson;
 using MongoDB.Bson.Serialization.Conventions;
+using MongoDB.Bson.Serialization.Attributes;
 using MongoDB.Driver;
 
 namespace CSharpExamples.UsageExamples.InsertMany;
@@ -71,10 +72,10 @@ private static List<Restaurant> GenerateDocuments()
                 Name = "Mongo's Pizza",
                 RestaurantId = $"12345-{i}",
                 Cuisine = "Pizza",
-                Address = new BsonDocument
+                Address = new()
                 {
-                    {"street", "Pizza St"},
-                    {"zipcode", "10003"}
+                    Street = "Pizza St",
+                    ZipCode = "10003"
                 },
                 Borough = "Manhattan",
             };
@@ -131,5 +132,5 @@ public class GradeEntry
 
     public string Grade { get; set; }
 
-    public float Score { get; set; }
+    public float? Score { get; set; }
 }
diff --git a/source/includes/code-examples/insert-one/InsertOne.cs b/source/includes/code-examples/insert-one/InsertOne.cs
index d0e9b37b..5d671f06 100644
--- a/source/includes/code-examples/insert-one/InsertOne.cs
+++ b/source/includes/code-examples/insert-one/InsertOne.cs
@@ -1,5 +1,6 @@
 using MongoDB.Bson;
 using MongoDB.Bson.Serialization.Conventions;
+using MongoDB.Bson.Serialization.Attributes;
 using MongoDB.Driver;
 
 namespace CsharpExamples.UsageExamples.InsertOne;
@@ -38,10 +39,10 @@ private static void InsertOneRestaurant()
             Name = "Mongo's Pizza",
             RestaurantId = "12345",
             Cuisine = "Pizza",
-            Address = new BsonDocument
+            Address = new()
             {
-                {"street", "Pizza St"},
-                {"zipcode", "10003"}
+                Street = "Pizza St",
+                ZipCode = "10003"
             },
             Borough = "Manhattan",
         };
@@ -108,5 +109,5 @@ public class GradeEntry
 
     public string Grade { get; set; }
 
-    public float Score { get; set; }
+    public float? Score { get; set; }
 }
diff --git a/source/includes/code-examples/insert-one/InsertOneAsync.cs b/source/includes/code-examples/insert-one/InsertOneAsync.cs
index c6a93ba0..c0c4477d 100644
--- a/source/includes/code-examples/insert-one/InsertOneAsync.cs
+++ b/source/includes/code-examples/insert-one/InsertOneAsync.cs
@@ -1,5 +1,6 @@
 using MongoDB.Bson;
 using MongoDB.Bson.Serialization.Conventions;
+using MongoDB.Bson.Serialization.Attributes;
 using MongoDB.Driver;
 
 namespace CsharpExamples.UsageExamples.InsertOne;
@@ -38,10 +39,10 @@ private static async Task InsertOneRestaurantAsync()
             Name = "Mongo's Pizza",
             RestaurantId = "12345",
             Cuisine = "Pizza",
-            Address = new BsonDocument
+            Address = new()
             {
-                {"street", "Pizza St"},
-                {"zipcode", "10003"}
+                Street = "Pizza St",
+                ZipCode = "10003"
             },
             Borough = "Manhattan",
         };
@@ -108,5 +109,5 @@ public class GradeEntry
 
     public string Grade { get; set; }
 
-    public float Score { get; set; }
+    public float? Score { get; set; }
 }
diff --git a/source/includes/code-examples/replace-one/ReplaceOne.cs b/source/includes/code-examples/replace-one/ReplaceOne.cs
index ca616c76..16141874 100644
--- a/source/includes/code-examples/replace-one/ReplaceOne.cs
+++ b/source/includes/code-examples/replace-one/ReplaceOne.cs
@@ -1,5 +1,6 @@
 using MongoDB.Bson;
 using MongoDB.Bson.Serialization.Conventions;
+using MongoDB.Bson.Serialization.Attributes;
 using MongoDB.Driver;
 
 namespace CSharpExamples.UsageExamples.ReplaceOne;
@@ -48,10 +49,10 @@ private static ReplaceOneResult ReplaceOneRestaurant()
             Id = oldId,
             Name = "Mongo's Pizza",
             Cuisine = "Pizza",
-            Address = new BsonDocument
+            Address = new()
             {
-                {"street", "Pizza St"},
-                {"zipcode", "10003"}
+                Street = "Pizza St",
+                ZipCode = "10003"
             },
             Borough = "Manhattan",
         };
@@ -110,5 +111,5 @@ public class GradeEntry
 
     public string Grade { get; set; }
 
-    public float Score { get; set; }
+    public float? Score { get; set; }
 }
diff --git a/source/includes/code-examples/replace-one/ReplaceOneAsync.cs b/source/includes/code-examples/replace-one/ReplaceOneAsync.cs
index 3c187b93..7f00f978 100644
--- a/source/includes/code-examples/replace-one/ReplaceOneAsync.cs
+++ b/source/includes/code-examples/replace-one/ReplaceOneAsync.cs
@@ -1,5 +1,6 @@
 using MongoDB.Bson;
 using MongoDB.Bson.Serialization.Conventions;
+using MongoDB.Bson.Serialization.Attributes;
 using MongoDB.Driver;
 
 namespace CSharpExamples.UsageExamples.ReplaceOne;
@@ -48,10 +49,10 @@ private static async Task<ReplaceOneResult> ReplaceOneRestaurant()
             Id = oldId,
             Name = "Mongo's Pizza",
             Cuisine = "Pizza",
-            Address = new BsonDocument
+            Address = new()
             {
-                {"street", "Pizza St"},
-                {"zipcode", "10003"}
+                Street = "Pizza St",
+                ZipCode = "10003"
             },
             Borough = "Manhattan",
         };
@@ -110,5 +111,5 @@ public class GradeEntry
 
     public string Grade { get; set; }
 
-    public float Score { get; set; }
+    public float? Score { get; set; }
 }
diff --git a/source/includes/code-examples/update-many/UpdateMany.cs b/source/includes/code-examples/update-many/UpdateMany.cs
index 554a5298..feed52ca 100644
--- a/source/includes/code-examples/update-many/UpdateMany.cs
+++ b/source/includes/code-examples/update-many/UpdateMany.cs
@@ -1,4 +1,8 @@
+// Updates documents that match a query filter by using the C# driver
+
+using MongoDB.Bson;
 using MongoDB.Bson.Serialization.Conventions;
+using MongoDB.Bson.Serialization.Attributes;
 using MongoDB.Driver;
 
 namespace CSharpExamples.UsageExamples.UpdateMany;
@@ -41,8 +45,9 @@ private static UpdateResult UpdateManyRestaurants()
         const string oldValue = "Pizza";
         const string newValue = "Pasta and breadsticks";
 
+        // Creates a filter for all documents with a "cuisine" value of "Pizza"
         var filter = Builders<Restaurant>.Filter
-            .Eq(restaurant => restaurant.Cuisine, oldValue);
+             .Eq(restaurant => restaurant.Cuisine, oldValue);
 
         var update = Builders<Restaurant>.Update
             .Set(restaurant => restaurant.Cuisine, newValue);
@@ -120,5 +125,5 @@ public class GradeEntry
 
     public string Grade { get; set; }
 
-    public float Score { get; set; }
+    public float? Score { get; set; }
 }
diff --git a/source/includes/code-examples/update-many/UpdateManyAsync.cs b/source/includes/code-examples/update-many/UpdateManyAsync.cs
index 8f178b74..7ebc02db 100644
--- a/source/includes/code-examples/update-many/UpdateManyAsync.cs
+++ b/source/includes/code-examples/update-many/UpdateManyAsync.cs
@@ -1,4 +1,8 @@
+// Asynchronously updates documents that match a query filter by using the C# driver
+
+using MongoDB.Bson;
 using MongoDB.Bson.Serialization.Conventions;
+using MongoDB.Bson.Serialization.Attributes;
 using MongoDB.Driver;
 
 namespace CSharpExamples.UsageExamples.UpdateMany;
@@ -41,8 +45,9 @@ private static async Task<UpdateResult> UpdateManyRestaurantsAsync()
         const string oldValue = "Pizza";
         const string newValue = "Pasta and breadsticks";
 
+        // Creates a filter for all documents with a "cuisine" value of "Pizza"
         var filter = Builders<Restaurant>.Filter
-            .Eq(restaurant => restaurant.Cuisine, oldValue);
+             .Eq(restaurant => restaurant.Cuisine, oldValue);
 
         var update = Builders<Restaurant>.Update
             .Set(restaurant => restaurant.Cuisine, newValue);
@@ -120,5 +125,5 @@ public class GradeEntry
 
     public string Grade { get; set; }
 
-    public float Score { get; set; }
+    public float? Score { get; set; }
 }
diff --git a/source/includes/code-examples/update-one/UpdateOne.cs b/source/includes/code-examples/update-one/UpdateOne.cs
index a0f769d5..83d2609a 100644
--- a/source/includes/code-examples/update-one/UpdateOne.cs
+++ b/source/includes/code-examples/update-one/UpdateOne.cs
@@ -1,3 +1,7 @@
+// Updates the first document that matches a query filter by using the C# driver
+
+using MongoDB.Bson;
+using MongoDB.Bson.Serialization.Attributes;
 using MongoDB.Bson.Serialization.Conventions;
 using MongoDB.Driver;
 
@@ -98,5 +102,5 @@ public class GradeEntry
 
     public string Grade { get; set; }
 
-    public float Score { get; set; }
+    public float? Score { get; set; }
 }
diff --git a/source/includes/code-examples/update-one/UpdateOneAsync.cs b/source/includes/code-examples/update-one/UpdateOneAsync.cs
index c0157367..ca37c747 100644
--- a/source/includes/code-examples/update-one/UpdateOneAsync.cs
+++ b/source/includes/code-examples/update-one/UpdateOneAsync.cs
@@ -1,3 +1,7 @@
+// Asynchronously updates the first document that matches a query filter by using the C# driver
+
+using MongoDB.Bson;
+using MongoDB.Bson.Serialization.Attributes;
 using MongoDB.Bson.Serialization.Conventions;
 using MongoDB.Driver;
 
@@ -98,5 +102,5 @@ public class GradeEntry
 
     public string Grade { get; set; }
 
-    public float Score { get; set; }
+    public float? Score { get; set; }
 }