using System;

using YamlDotNet.Core;

using YamlDotNet.Core.Events;

using YamlDotNet.Serialization;

​

public class Program

{

    public static void Main()

    {

        var templatedValueDeserializer = new TemplatedValueDeserializer("world");

        var deserializer = new DeserializerBuilder()

            .WithNodeDeserializer(templatedValueDeserializer)

            .Build();

        var yaml = @"Text: Hello {{name}}";

        var data = deserializer.Deserialize<Document>(yaml);

        data.Dump();

    }

    public class Document

    {

        public string Text { get; set; }

    }

    public class TemplatedValueDeserializer : INodeDeserializer

    {

        private string name;

        public TemplatedValueDeserializer(string name)

        {

            this.name = name;

        }

        bool INodeDeserializer.Deserialize(IParser parser, Type expectedType, Func<IParser, Type, object> nestedObjectDeserializer, out object value)

        {

            if (expectedType != typeof(string))

            {

                value = null;

                return false;

            }

            var scalar = parser.Allow<Scalar>();

            if (scalar == null)

            {

                value = null;

                return false;

            }

            var template = scalar.Value;

            value = template.Replace("{{name}}", name);

            return true;

        }

    }

}