using System;

using System.Text;

using System.Globalization;

​

public class Program

{

    public static void Main()

    {

        var text = "ßäöüÄÖÜąąęśćźżółùûüÿçæâàéèêëïîôœàâ";

        var date = DateTime.Now;

        var id = 6;

        var g = ToGuid(id, date);

        Console.WriteLine("{0}", g);

        Console.WriteLine("{0}", Guid2Int(g));

        //Console.WriteLine(RemoveDiacritics(text));

    }

    static string RemoveDiacritics(string text) 

    {

        var normalizedString = text.Normalize(NormalizationForm.FormD);

        var stringBuilder = new StringBuilder();

        foreach (var c in normalizedString)

        {

            var unicodeCategory = CharUnicodeInfo.GetUnicodeCategory(c);

            if (unicodeCategory != UnicodeCategory.NonSpacingMark)

            {

                stringBuilder.Append(c);

            }

        }

        return stringBuilder.ToString().Normalize(NormalizationForm.FormC);

    }

    public static Guid ToGuid(int val, DateTime date)

    {

        byte[] bytes = new byte[16];

        BitConverter.GetBytes(val * (date.Millisecond + 1)).CopyTo(bytes, 8);

        BitConverter.GetBytes(date.ToBinary()).CopyTo(bytes, 0);

        BitConverter.GetBytes(date.Year).CopyTo(bytes, 12);

        return new Guid(bytes);

    }

    public static int Guid2Int(Guid value)

    {

        byte[] b = value.ToByteArray();

        DateTime d = DateTime.FromBinary(BitConverter.ToInt64(b, 0));

        int bint = BitConverter.ToInt32(b, 8)/(d.Millisecond + 1);

        return bint;

    }

}