using System;

using System.Security.Cryptography;

using System.Text;

​

public class Program

{

​

    public static string GetManufacturerShopwareId(string value)

    {

        return ($"manufacturer_{value.Trim().ToLowerInvariant()})").GetMd5Hash();

    }

    public static void Main()

    {

        var id1 = GetManufacturerShopwareId("pewag");

        var id2 = GetManufacturerShopwareId("König");

        var id3 = GetManufacturerShopwareId("GoSoft");

        Console.WriteLine(id1);

        Console.WriteLine(id2);

        Console.WriteLine(id3);

    }

}

​

public static class StringExtension {

    public static string GetMd5Hash(this string value)

    {

        return Md5Helper.CreateMd5Hash(value);

    }

}

​

public static class Md5Helper {

    public static string CreateMd5Hash(string value)

    {

        using var hash = MD5.Create();

​

        byte[] hashValue = hash.ComputeHash(Encoding.UTF8.GetBytes(value));

​

        return Convert

            .ToHexString(hashValue)

            .ToLowerInvariant();

    }

}