using System;

using System.Linq;

using System.Collections.Generic;

public class Program

{

    // Parses input lines into records

    public static Dictionary<string, T> LineDictionary<T>(string input, char[] fieldSeparators, Func<string[], T> valueParser)

    {

        return input.Split(new char[]{ '\r','\n' }, StringSplitOptions.RemoveEmptyEntries)

                    .Select(line => line.Split(fieldSeparators))

                    .ToDictionary(rec => rec[0].Trim(), valueParser);

    }

    public static void Main()

    {

        string csv = @"John;42

                       Bob,13";

        // var resolves to Dictionary<string, int> at compile-time

        var parsed = LineDictionary(csv, new char[]{ ',', ';' }, rec => Int32.Parse(rec[1]));

        // However I would consider explicitly writing the type here for readability

        Dictionary<string, int> parsed2 = LineDictionary(csv, new char[]{ ',', ';' }, rec => Int32.Parse(rec[1]));

        Console.WriteLine(parsed["John"]);

        foreach (var x in parsed)

            Console.WriteLine(x.Key+" = "+x.Value);

    }

}