Converters.cs

static string camelConverter(string[] words) {

    var result = new StringBuilder();

    // First word is lower
    result.Append(
        words[0]
            .Trim()
            .ToLower()
    );

    // Subsequent words are Proper case
    for (var offset = 1;
            offset < words.Length;
            offset++)
    {
        // First letter is uppercase
        result.Append(
            words[offset]
                .Substring(0, 1)
                .ToUpper());

        // Rest of the letters are lowercase
        result.Append(
            words[offset].
                Substring(1).
                ToLower());
    }

    return result.ToString();
}

static string lowerConverter(params string[] words) {
    // Accumulate result in StringBuilder
    var result = new StringBuilder();

        // Every word is converted to lower
        // And concatenated
        foreach (var word in words)
        {
            result.Append(
                word
                    .Trim()
                    .ToLower());
    }
    return result.ToString();
}