New alphabet in Kazakhstan source code

string lat(string s1){
    s1 = s1.ToLower();
    string s2 = "";
    for (int i = 0; i < s1.Length; i++)
                    {

                        switch (s1[i])
                        {
                            case 'а':
                                s2 += 'a';
                                break;
                            case 'ә':
                                s2 += 'a' + "'";
                                break;
                            case 'б':
                                s2 += 'b';
                                break;
                            case 'д':
                                s2 += 'd';
                                break;
                            case 'е':
                                s2 += 'e';
                                break;
                            case 'ф':
                                s2 += 'f';
                                break;
                            case 'г':
                                s2 += 'g';
                                break;
                            case 'ғ':
                                s2 += 'g' + "'";
                                break;
                            case 'х':
                                s2 += 'h';
                                break;
                            case 'һ':
                                s2 += 'h';
                                break;
                            case 'і':
                                s2 += 'i';
                                break;
                            case 'и':
                                s2 += 'i' + "'";
                                break;
                            case 'й':
                                s2 += 'i' + "'";
                                break;
                            case 'ж':
                                s2 += 'j';
                                break;
                            case 'к':
                                s2 += 'k';
                                break;
                            case 'л':
                                s2 += 'l';
                                break;
                            case 'м':
                                s2 += 'm';
                                break;
                            case 'н':
                                s2 += 'n';
                                break;
                            case 'ң':
                                s2 += 'n' + "'";
                                break;
                            case 'о':
                                s2 += 'o';
                                break;
                            case 'ө':
                                s2 += 'o' + "'";
                                break;
                            case 'п':
                                s2 += 'p';
                                break;
                            case 'қ':
                                s2 += 'q';
                                break;
                            case 'р':
                                s2 += 'r';
                                break;
                            case 'с':
                                s2 += 's';
                                break;
                            case 'ш':
                                s2 += 's' + "'";
                                break;
                            case 'ч':
                                s2 += 'c' + "'";
                                break;
                            case 'т':
                                s2 += 't';
                                break;
                            case 'ұ':
                                s2 += 'u';
                                break;
                            case 'ү':
                                s2 += 'u' + "'";
                                break;
                            case 'в':
                                s2 += 'v';
                                break;
                            case 'ы':
                                s2 += 'y';
                                break;
                            case 'у':
                                s2 += 'y' + "'";
                                break;
                            case 'з':
                                s2 += 'z';
                                break;
                            default:
                                s2 += s1[i];
                                break;
                        }

                    }
                   return s2;
      }


string qaz(string s1){
    s1 = s1.ToLower();
    string s2 = "";
    string s3 = "'";
                    for (int i = 0; i < s1.Length; i++)
                    {

                            try
                            {
                                if (s1[i] == 'a' && s1[i + 1] == s3[0])
                                {
                                    s2 += 'ә';
                                    i++;
                                    continue;
                                }
                                if (s1[i] == 'g' && s1[i + 1] == s3[0])
                                {
                                    s2 += 'ғ';
                                    i++;
                                    continue;
                                }
                                if (s1[i] == 'i' && s1[i + 1] == s3[0])
                                {
                                    s2 += 'и';
                                    i++;
                                    continue;
                                }
                                if (s1[i] == 'n' && s1[i + 1] == s3[0])
                                {
                                    s2 += 'ң';
                                    i++;
                                    continue;
                                }
                                if (s1[i] == 'o' && s1[i + 1] == s3[0])
                                {
                                    s2 += 'ө';
                                    i++;
                                    continue;
                                }
                                if (s1[i] == 's' && s1[i + 1] == s3[0])
                                {
                                    s2 += 'ш';
                                    i++;
                                    continue;
                                }
                                if (s1[i] == 'c' && s1[i + 1] == s3[0])
                                {
                                    s2 += 'ч';
                                    i++;
                                    continue;
                                }
                                if (s1[i] == 'u' && s1[i + 1] == s3[0])
                                {
                                    s2 += 'ү';
                                    i++;
                                    continue;
                                }
                                if (s1[i] == 'y' && s1[i + 1] == s3[0])
                                {
                                    s2 += 'у';
                                    i++;
                                    continue;
                                }
                            }
                            catch
                            {

                            }
                            if (s1[i] == 'a')
                            {
                                s2 += 'а';
                                continue;
                            }
                            if (s1[i] == 'b')
                            {
                                s2 += 'б';
                                continue;
                            }
                            if (s1[i] == 'd')
                            {
                                s2 += 'д';
                                continue;
                            }
                            if (s1[i] == 'e')
                            {
                                s2 += 'е';
                                continue;
                            }
                            if (s1[i] == 'f')
                            {
                                s2 += 'ф';
                                continue;
                            }
                            if (s1[i] == 'g')
                            {
                                s2 += 'г';
                                continue;
                            }
                            if (s1[i] == 'h')
                            {
                                s2 += 'һ';
                                continue;
                            }
                            if (s1[i] == 'i')
                            {
                                s2 += 'і';
                                continue;
                            }
                            if (s1[i] == 'j')
                            {
                                s2 += 'ж';
                                continue;
                            }
                            if (s1[i] == 'k')
                            {
                                s2 += 'к';
                                continue;
                            }
                            if (s1[i] == 'л')
                            {
                                s2 += 'л';
                                continue;
                            }
                            if (s1[i] == 'm')
                            {
                                s2 += 'м';
                                continue;
                            }
                            if (s1[i] == 'n')
                            {
                                s2 += 'н';
                                continue;
                            }
                            if (s1[i] == 'o')
                            {
                                s2 += 'о';
                                continue;
                            }
                            if (s1[i] == 'p')
                            {
                                s2 += 'п';
                                continue;
                            }
                            if (s1[i] == 'q')
                            {
                                s2 += 'қ';
                                continue;
                            }
                            if (s1[i] == 'r')
                            {
                                s2 += 'р';
                                continue;
                            }
                            if (s1[i] == 's')
                            {
                                s2 += 'с';
                                continue;
                            }
                            if (s1[i] == 't')
                            {
                                s2 += 'т';
                                continue;
                            }
                            if (s1[i] == 'u')
                            {
                                s2 += 'ұ';
                                continue;
                            }
                            if (s1[i] == 'v')
                            {
                                s2 += 'в';
                                continue;
                            }
                            if (s1[i] == 'y')
                            {
                                s2 += 'ы';
                                continue;
                            }
                            if (s1[i] == 'z')
                            {
                                s2 += 'з';
                                continue;
                            }
                            s2 += s1[i];


                    }
                    return s2;
}