using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.IO;

using System.Globalization;

using System.Diagnostics;

    public class Program

    {

        public static void Main()

        {

            var original = "{}[]";

            var target = "äüÄÜ";

​

            int count = 0;

            foreach (var toEncoding in Encoding.GetEncodings())

                foreach (var fromEncoding in Encoding.GetEncodings())

                {

                    var s = toEncoding.GetEncoding().GetString(fromEncoding.GetEncoding().GetBytes(original));

                    if (s == target)

                    {

                        Console.WriteLine(string.Format("Match Found: Encoding via {0} and decoding via {1}", fromEncoding.Name, toEncoding.Name));

                        count++;

                    }

                }

​

            Console.WriteLine("Found {0} matches", count);

            TestJsonFix();

        }

        private static void TestJsonFix()

        {

            TestJsonFix("IBM01141", "IBM037");

        }

​

        private static void TestJsonFix(string toEncodingName, string fromEncodingName)

        {

            var json = @"äÄ

    ""key1"": ""  10"",

    ""key2"": ""beigef}gtem Zahlschein"",

    ""key3"": ""     G E L \ S C H T"",

    ""key4"": ""M}nchen"",

    ""key5"": ""M{rz"",

    ""key6"": ""[huus""

Ü

ä";

            Console.WriteLine(string.Format("Testing re-encoding from \"{0}\" to \"{1}\"", fromEncodingName, toEncodingName));

            var fixedJson = Encoding.GetEncoding(toEncodingName).GetString(Encoding.GetEncoding(fromEncodingName).GetBytes(json));

            Console.WriteLine(fixedJson);

        }   

    }