using System;

using System.IO;

using YamlDotNet.RepresentationModel;

​

namespace YamlDotNet.Samples

{

    public class ModifyingAYamlStream

    {

        public static void Main()

        {

            var input = new StringReader(Document);

            var yaml = new YamlStream();

            yaml.Load(input);

            var root = (YamlMappingNode)yaml.Documents[0].RootNode;

            ((YamlScalarNode)root.Children["A"]["a2"]).Value = "modified";

            yaml.Save(Console.Out, assignAnchors: false);

        }

​

        private const string Document = @"A:

  a1: value1

  a2: value2";

    }

}

​