fix: csharp json serialization

examples/csharp-generate-json-serializer/__snapshots__/index.spec.ts.snap

@@ -12,6 +12,22 @@ public partial class Root
     get { return email; }
     set { this.email = value; }
   }
+
+
+    public string Serialize()
+    {
+      return this.Serialize(null);
+    }
+    public string Serialize(JsonSerializerOptions options = null) 
+    {
+      return JsonSerializer.Serialize(this, options);
+    }
+    public static Root Deserialize(string json)
+    {
+      var deserializeOptions = new JsonSerializerOptions();
+      deserializeOptions.Converters.Add(new RootConverter());
+      return JsonSerializer.Deserialize<Root>(json, deserializeOptions);
+    }
 }
 
 internal class RootConverter : JsonConverter<Root>

src/generators/csharp/presets/JsonSerializerPreset.ts

@@ -204,12 +204,29 @@ ${renderer.indent(deserializeProperties, 4)}
 }
 
 /**
- * Preset which adds `serialize` and `deserialize` functions to class.
+ * Preset which adds `Serialize` and `Deserialize` functions to the class.
  *
  * @implements {CSharpPreset}
  */
 export const CSHARP_JSON_SERIALIZER_PRESET: CSharpPreset<CSharpOptions> = {
   class: {
+    additionalContent({ renderer, content, model }) {
+      const supportFunctions = `public string Serialize()
+{
+  return this.Serialize(null);
+}
+public string Serialize(JsonSerializerOptions options = null) 
+{
+  return JsonSerializer.Serialize(this, options);
+}
+public static ${model.type} Deserialize(string json)
+{
+  var deserializeOptions = new JsonSerializerOptions();
+  deserializeOptions.Converters.Add(new ${model.name}Converter());
+  return JsonSerializer.Deserialize<${model.type}>(json, deserializeOptions);
+}`;
+      return `${content}\n${renderer.indent(supportFunctions)}`;
+    },
     self({ renderer, model, content }) {
       renderer.dependencyManager.addDependency('using System.Text.Json;');
       renderer.dependencyManager.addDependency(

test/generators/csharp/presets/__snapshots__/JsonSerializerPreset.spec.ts.snap

@@ -45,6 +45,22 @@ public partial class Test
     get { return additionalProperties; }
     set { this.additionalProperties = value; }
   }
+
+
+    public string Serialize()
+    {
+      return this.Serialize(null);
+    }
+    public string Serialize(JsonSerializerOptions options = null) 
+    {
+      return JsonSerializer.Serialize(this, options);
+    }
+    public static Test Deserialize(string json)
+    {
+      var deserializeOptions = new JsonSerializerOptions();
+      deserializeOptions.Converters.Add(new TestConverter());
+      return JsonSerializer.Deserialize<Test>(json, deserializeOptions);
+    }
 }
 
 internal class TestConverter : JsonConverter<Test>
@@ -223,6 +239,22 @@ public partial class NestedTest
     get { return additionalProperties; }
     set { this.additionalProperties = value; }
   }
+
+
+    public string Serialize()
+    {
+      return this.Serialize(null);
+    }
+    public string Serialize(JsonSerializerOptions options = null) 
+    {
+      return JsonSerializer.Serialize(this, options);
+    }
+    public static NestedTest Deserialize(string json)
+    {
+      var deserializeOptions = new JsonSerializerOptions();
+      deserializeOptions.Converters.Add(new NestedTestConverter());
+      return JsonSerializer.Deserialize<NestedTest>(json, deserializeOptions);
+    }
 }
 
 internal class NestedTestConverter : JsonConverter<NestedTest>