DOCSP-49867: Add JsonReader example (#636)

Author: mcmorisi

source/data-formats/extended-json.txt

@@ -28,7 +28,7 @@ Read Extended JSON
 ------------------
 
 You can read an Extended JSON documents into a {+language+} object by using the
-``BsonSerializer.Deserialize<T>()`` method. The following example reads an
+``BsonDocument.Parse()`` method. The following example reads an
 Extended JSON document into a ``BsonDocument`` object:
 
 .. io-code-block::
@@ -78,7 +78,7 @@ property:
 API Documentation
 -----------------
 
-To learn more about the methods and classes used on this page, see the following API
+To learn more about the methods and classes you can use to work with JSON documents, see the following API
 documentation:
 
 - `BsonDocument <{+new-api-root+}/MongoDB.Bson/MongoDB.Bson.BsonDocument.html>`__
@@ -87,5 +87,4 @@ documentation:
 - `JsonWriter <{+new-api-root+}/MongoDB.Bson/MongoDB.Bson.IO.JsonWriter.html>`__
 - `JsonReader <{+new-api-root+}/MongoDB.Bson/MongoDB.Bson.IO.JsonReader.html>`__
 - `JsonWriterSettings <{+new-api-root+}/MongoDB.Bson/MongoDB.Bson.IO.JsonWriterSettings.html>`__
-- `JsonReaderSettings <{+new-api-root+}/MongoDB.Bson/MongoDB.Bson.IO.JsonReaderSettings.html>`__
 - `JsonOutputMode <{+new-api-root+}/MongoDB.Bson/MongoDB.Bson.IO.JsonOutputMode.html>`__

source/includes/fundamentals/code-examples/ExtendedJson.cs

@@ -1,6 +1,4 @@
 using MongoDB.Bson;
-using MongoDB.Bson.IO;
-using MongoDB.Bson.Serialization;
 
 public class ExtendedJson
 {
@@ -10,11 +8,11 @@ public static void Main(string[] args)
             // start-read-ejson
             var ejson = "{\n\"_id\": { \"$oid\": \"573a1391f29313caabcd9637\" },\n  \"createdAt\": { \"$date\": { \"$numberLong\": \"1601499609\" }},\n\"numViews\": { \"$numberLong\": \"36520312\" }\n}\n\n";
 
-            var document = BsonSerializer.Deserialize<BsonDocument>(ejson);
+            var document = BsonDocument.Parse(ejson);
             Console.WriteLine(document.ToJson());
             // end-read-ejson
         }
-
+        
         {
             // start-write-ejson
             var document = new MyDocument();