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Install

dotnet add package SharpYaml

SharpYaml targets net8.0, net10.0, and netstandard2.0.

SharpYaml supports .NET net8.0 through net10.0 with fully optimized implementations, and also ships a netstandard2.0 build for broad runtime compatibility.

Serialize and deserialize

using SharpYaml;

var yaml = YamlSerializer.Serialize(new { Name = "Ada", Age = 37 });

var person = YamlSerializer.Deserialize<Person>(yaml);

Configure options

using System.Text.Json;
using SharpYaml;

var options = new YamlSerializerOptions
{
    PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
    WriteIndented = true,
    IndentSize = 4,
    DefaultIgnoreCondition = YamlIgnoreCondition.WhenWritingNull,
};

var yaml = YamlSerializer.Serialize(config, options);
var config2 = YamlSerializer.Deserialize<MyConfig>(yaml, options);

Source generation (NativeAOT friendly)

SharpYaml reuses System.Text.Json source-generation attributes.

  1. Declare a context with [JsonSerializable] roots:
using System.Text.Json.Serialization;
using SharpYaml.Serialization;

[YamlSourceGenerationOptions(
    PropertyNamingPolicy = System.Text.Json.JsonKnownNamingPolicy.CamelCase)]
[JsonSerializable(typeof(MyConfig))]
internal partial class MyYamlContext : YamlSerializerContext
{
}
  1. Use the generated YamlTypeInfo<T>:
var context = MyYamlContext.Default;

var yaml = YamlSerializer.Serialize(config, context.MyConfig);
var roundTrip = YamlSerializer.Deserialize(yaml, context.MyConfig);

If you need to resolve metadata by type at runtime (for example Serialize(object, Type, ...)), prefer the overloads that accept a context:

var yaml = YamlSerializer.Serialize(config, typeof(MyConfig), context);

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