Fix the readme issue

Author: alexeyzimarev

docs/serialization.md

@@ -37,7 +37,10 @@ In previous versions of RestSharp, the default XML serializer was a custom RestS
 You can add it back if necessary by installing the package and adding it to the client:
 
 ```csharp
-client.UseXmlSerializer();
+var client = new RestClient(
+    options, 
+    configureSerialization: s => s.UseXmlSerializer()
+);
 ```
 
 As before, you can supply three optional arguments for a custom namespace, custom root element, and if you want to use `SerializeAs` and `DeserializeAs` attributed.
@@ -77,6 +80,29 @@ JsonSerializerSettings DefaultSettings = new JsonSerializerSettings {
 If you need to use different settings, you can supply your instance of
 `JsonSerializerSettings` as a parameter for the extension method.
 
+## CSV
+
+A separate package `RestSharp.Serializers.CsvHelper` provides a CSV serializer for RestSharp. It is based on the 
+`CsvHelper` library.
+
+Use the extension method provided by the package to configure the client:
+
+```csharp
+var client = new RestClient(
+    options, 
+    configureSerialization: s => s.UseCsvHelper()
+);
+```
+
+You can also supply your instance of `CsvConfiguration` as a parameter for the extension method.
+
+```csharp
+var client = new RestClient(
+    options, 
+    configureSerialization: s => s.UseCsvHelper(new CsvConfiguration(CultureInfo.InvariantCulture) {...})
+);
+```
+
 ## Custom
 
 You can also implement your custom serializer. To support both serialization and

src/RestSharp.Serializers.CsvHelper/README.md

@@ -0,0 +1,2 @@
+# About
+

src/RestSharp.Serializers.CsvHelper/RestSharp.Serializers.CsvHelper.csproj

@@ -8,4 +8,7 @@
     <ItemGroup>
         <Using Remove="System.Net.Http"/>
     </ItemGroup>
+    <ItemGroup>
+        <None Include="README.md" Pack="true" PackagePath="\" />
+    </ItemGroup>
 </Project>

src/RestSharp.Serializers.NewtonsoftJson/README.md

@@ -0,0 +1,19 @@
+# About
+
+This library allows using Newtonsoft.Json as a serializer for RestSharp instead of the default JSON serializer based 
+on `System.Text.Json`.
+
+# How to use
+
+The default JSON serializer uses `System.Text.Json`, which is a part of .NET since .NET 6.
+
+If you want to use Newtonsoft.Json, you can install the `RestSharp.Serializers.NewtonsoftJson` package and configure 
+the 
+client to use it:
+
+```csharp
+var client = new RestClient(
+    options, 
+    configureSerialization: s => s.UseNewtonsoftJson()
+);
+```

src/RestSharp.Serializers.NewtonsoftJson/RestSharp.Serializers.NewtonsoftJson.csproj

@@ -9,4 +9,7 @@
         <Using Include="Newtonsoft.Json"/>
         <Using Remove="System.Net.Http"/>
     </ItemGroup>
+    <ItemGroup>
+        <None Include="README.md" Pack="true" PackagePath="\" />
+    </ItemGroup>
 </Project>

src/RestSharp.Serializers.Xml/README.md

@@ -0,0 +1,22 @@
+# About
+
+This package is a custom XML serializer for RestSharp. It is based on the original XML serializer that was part of RestSharp but was removed in version 107.0.0.
+
+# How to use
+
+The default XML serializer in RestSharp is `DotNetXmlSerializer`, which uses `System.Xml.Serialization` library from .
+NET.
+
+In previous versions of RestSharp, the default XML serializer was a custom RestSharp XML serializer. To make the 
+code library size smaller, the custom serializer was removed from RestSharp.
+
+You can add it back if necessary by installing the `RestSharp.Serializers.Xml` package and adding it to the client:
+
+```csharp
+var client = new RestClient(
+    options, 
+    configureSerialization: s => s.UseXmlSerializer()
+);
+```
+
+As before, you can supply three optional arguments for a custom namespace, custom root element, and if you want to use `SerializeAs` and `DeserializeAs` attributed.

src/RestSharp.Serializers.Xml/RestSharp.Serializers.Xml.csproj

@@ -8,4 +8,7 @@
     <ItemGroup>
         <Using Remove="System.Net.Http"/>
     </ItemGroup>
+    <ItemGroup>
+        <None Include="README.md" Pack="true" PackagePath="\" />
+    </ItemGroup>
 </Project>