Remove words in string from words in array with c#

Question

I need to remove words from a string based on a set of words:

Words I want to remove:

DE DA DAS DO DOS AN NAS NO NOS EM E A AS O OS AO AOS P LDA AND

If I receive a string like:

EDIT: This string is already "cleaned" from any symbols

THIS IS AN AMAZING WEBSITE AND LAYOUT

The result should be:

THIS IS AMAZING WEBSITE LAYOUT

So far I have:

public static string StringWordsRemove(string stringToClean, string wordsToRemove)
{
    string[] splitWords = wordsToRemove.Split(new Char[] { ' ' });

    string pattern = "";

    foreach (string word in splitWords)
    {
        pattern = @"\b" + word + "\b";
        stringToClean = Regex.Replace(stringToClean, pattern, "");
    }

    return stringToClean;
}

But it's not removing the words, any idea?

I don't know if I'm using the most eficient way to do it, maybe put the words in a array just to avoid spliting them all the time?

Thanks

Answer 1

private static List<string> wordsToRemove =
    "DE DA DAS DO DOS AN NAS NO NOS EM E A AS O OS AO AOS P LDA AND".Split(' ').ToList();

public static string StringWordsRemove(string stringToClean)
{
    return string.Join(" ", stringToClean.Split(' ').Except(wordsToRemove));
}

Modification to handle punctuations:

public static string StringWordsRemove(string stringToClean)
{
    // Define how to tokenize the input string, i.e. space only or punctuations also
    return string.Join(" ", stringToClean
        .Split(new[] { ' ', ',', '.', '?', '!' }, StringSplitOptions.RemoveEmptyEntries)
        .Except(wordsToRemove));
}

Answer 2

I just changed this line

pattern = @"\b" + word + "\b";

to this

pattern = @"\b" + word + @"\b"; //added '@' 

and I got the result

THIS IS AMAZING WEBSITE LAYOUT

and it would be better if you use String.Empty instead of "" like:

stringToClean = Regex.Replace(stringToClean, pattern, String.Empty);