Question

How to read Dictionary from binary file in C#

Answer 1

using System.Collections.Generic;
using System.IO;
using System;

namespace ConsoleApplication_C_Sharp
{
    class Program
    {
        static void Main(string[] args)
        {
            var dictionary = new Dictionary<string, int>();

            dictionary = ReadDictionaryFromBinFile("d:\\dictionary.bin");

            foreach (var kv in dictionary)
                Console.WriteLine(kv.Key + " - " + kv.Value);
        }
        static Dictionary<string, int> ReadDictionaryFromBinFile(string file)
        {
            var dictionary = new Dictionary<string, int>();

            using (FileStream fs = File.OpenRead(file))

            using (BinaryReader reader = new BinaryReader(fs))
            {
                int count = reader.ReadInt32();

                for (int i = 0; i < count; i++)
                {
                    string key = reader.ReadString();
                    int value = reader.ReadInt32();

                    dictionary[key] = value;
                }
            }
            return dictionary;
        }
    }
}


/*
run:

c# - 1
c - 2
c++ - 3
java - 4

*/

 

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