❔ Wat!! How is it possible that a regex adds more words to my Dictionary?

using HttpClient client = new();

var rawSource = await ProcessRepositoriesAsync(client);

var dictionary = new Dictionary<string, long>(StringComparer.OrdinalIgnoreCase);

// Cleaning up a bit
var words = CleanByRegex(rawSource);
string[] arr = words.Split(' '); // clean up same result:



string CleanByRegex(string rawSource)
{
    Regex r = new Regex("(?:[^a-zA-Z0-9]|(?<=['\\\"]\\s))", RegexOptions.IgnoreCase | RegexOptions.Compiled);
    return r.Replace(rawSource, " ");
}


//     arr    {string[220980]} - with regex
//  arr    {string[157594]} - without regex    

foreach (var word in arr)
{
    if (word.Length >= 3) // at least 3 letters
    {
        if (dictionary.ContainsKey(word)) //if it's in the dictionary
            dictionary[word] = dictionary[word] + 1; //Increment the count
        else
            dictionary[word] = 1; //put it in the dictionary with a count 1
    }
}

var frequentCount =
    dictionary.Aggregate((x, y) => x.Value > y.Value ? x : y).Value;
var frequentWord =
    dictionary.Aggregate((x, y) => x.Value > y.Value ? x : y).Key;



Console.WriteLine("FrequentCount: " + frequentCount);
Console.WriteLine("Word Frequently used: " + frequentWord);

var twentyMostFrequentWords = dictionary.OrderByDescending(x => x.Value).Take(20);

foreach (var item in twentyMostFrequentWords)
{
    Console.WriteLine("Word = {0} || Count = {1}", item.Key, item.Value);
}

// Clean up


var tenlongestWords = dictionary.OrderByDescending(x => x.Key.Length).Take(20);
foreach (var item in tenlongestWords)
{
    Console.Write(item);
}
Console.ReadKey();

static async Task<string> ProcessRepositoriesAsync(HttpClient client)
{
    var source = await client.GetStringAsync(
         "SomeURL");
    return source;
}

using HttpClient client = new();

var rawSource = await ProcessRepositoriesAsync(client);

var dictionary = new Dictionary<string, long>(StringComparer.OrdinalIgnoreCase);

// Cleaning up a bit
var words = CleanByRegex(rawSource);
string[] arr = words.Split(' '); // clean up same result:



string CleanByRegex(string rawSource)
{
    Regex r = new Regex("(?:[^a-zA-Z0-9]|(?<=['\\\"]\\s))", RegexOptions.IgnoreCase | RegexOptions.Compiled);
    return r.Replace(rawSource, " ");
}


//     arr    {string[220980]} - with regex
//  arr    {string[157594]} - without regex    

foreach (var word in arr)
{
    if (word.Length >= 3) // at least 3 letters
    {
        if (dictionary.ContainsKey(word)) //if it's in the dictionary
            dictionary[word] = dictionary[word] + 1; //Increment the count
        else
            dictionary[word] = 1; //put it in the dictionary with a count 1
    }
}

var frequentCount =
    dictionary.Aggregate((x, y) => x.Value > y.Value ? x : y).Value;
var frequentWord =
    dictionary.Aggregate((x, y) => x.Value > y.Value ? x : y).Key;



Console.WriteLine("FrequentCount: " + frequentCount);
Console.WriteLine("Word Frequently used: " + frequentWord);

var twentyMostFrequentWords = dictionary.OrderByDescending(x => x.Value).Take(20);

foreach (var item in twentyMostFrequentWords)
{
    Console.WriteLine("Word = {0} || Count = {1}", item.Key, item.Value);
}

// Clean up


var tenlongestWords = dictionary.OrderByDescending(x => x.Key.Length).Take(20);
foreach (var item in tenlongestWords)
{
    Console.Write(item);
}
Console.ReadKey();

static async Task<string> ProcessRepositoriesAsync(HttpClient client)
{
    var source = await client.GetStringAsync(
         "SomeURL");
    return source;
}