Converts plain text request rules to JSON format

ConvertRulesToJSON.cs

// add reference: Newtonsoft.Json
using System.Globalization;
using System.IO;
using System.Linq;
using Newtonsoft.Json;

namespace Rules.Transformation.Json
{
    internal class Program
    {
        private static void Main()
        {
            const string fileName = @"C:\Work\rules.txt";
            const string jsonFileName = @"C:\Work\rules.json";

            File.WriteAllText(jsonFileName, JsonConvert.SerializeObject(new
            {
                coefficients = (
                        from line in File.ReadAllLines(fileName)
                        let cols = line.Split('\t')
                        where cols.Length == 3
                        group new
                        {
                            f = cols[1].Split('|'),
                            c = double.Parse(cols[2], CultureInfo.InvariantCulture)
                        } by cols[0]
                        into featuresGroup
                        select featuresGroup
                    ).ToDictionary(a => a.Key, a => a)
            }));
        }
    }
}