Ignore null values

ToonSharp.Tests/ToonSharp.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net9.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <IsPackable>false</IsPackable>

ToonSharp/ToonSerializer.cs

@@ -1,6 +1,7 @@
 using System.Diagnostics.CodeAnalysis;
 using System.Text.Json;
 using System.Text.Json.Nodes;
+using System.Text.Json.Serialization;
 
 namespace ToonSharp;
 
@@ -9,6 +10,11 @@ namespace ToonSharp;
 /// </summary>
 public static class ToonSerializer
 {
+    private static readonly JsonSerializerOptions jsonOptions = new()
+    {
+      DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull
+    };
+
     /// <summary>
     /// Converts the provided value to a TOON string.
     /// </summary>
@@ -21,7 +27,7 @@ public static class ToonSerializer
         options ??= ToonSerializerOptions.Default;
 
         // Convert to JsonNode first for normalization
-        var jsonNode = JsonSerializer.SerializeToNode(value);
+        var jsonNode = JsonSerializer.SerializeToNode(value, jsonOptions);
 
         var writer = new ToonWriter(options);
         return writer.Write(jsonNode);
@@ -75,7 +81,7 @@ public static class ToonSerializer
     public static TValue? Deserialize<TValue>(string toon, ToonSerializerOptions? options = null)
     {
         var jsonNode = Deserialize(toon, options);
-        return jsonNode is null ? default : jsonNode.Deserialize<TValue>();
+        return jsonNode is null ? default : jsonNode.Deserialize<TValue>(jsonOptions);
     }
 
     /// <summary>

ToonSharp/ToonSharp.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFramework>net9.0</TargetFramework>
+        <TargetFramework>net10.0</TargetFramework>
         <ImplicitUsings>enable</ImplicitUsings>
         <Nullable>enable</Nullable>
         <LangVersion>12</LangVersion>