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    <p>You can use a simple LINQ query, if all you need is to check for substrings:</p> <pre><code>var q = words.Any(w =&gt; myText.Contains(w)); // returns true if myText == "This password1 is weak"; </code></pre> <p>If you want to check for whole words, you can use a regular expression:</p> <ol> <li><p>Matching against a regular expression that is the disjunction of all the words:</p> <pre><code>// you may need to call ToArray if you're not on .NET 4 var escapedWords = words.Select(w =&gt; @"\b" + Regex.Escape(w) + @"\b"); // the following line builds a regex similar to: (word1)|(word2)|(word3) var pattern = new Regex("(" + string.Join(")|(", escapedWords) + ")"); var q = pattern.IsMatch(myText); </code></pre></li> <li><p>Splitting the string into words with a regular expression, and testing for membership on the words collection (this will get faster if you use make words into a <code>HashSet</code> instead of a <code>List</code>):</p> <pre><code>var pattern = new Regex(@"\W"); var q = pattern.Split(myText).Any(w =&gt; words.Contains(w)); </code></pre></li> </ol> <p>In order to filter a collection of sentences according to this criterion all you have to do is put it into a function and call <code>Where</code>:</p> <pre><code> // Given: // bool HasThoseWords(string sentence) { blah } var q = sentences.Where(HasThoseWords); </code></pre> <p>Or put it in a lambda:</p> <pre><code> var q = sentences.Where(s =&gt; Regex.Split(myText, @"\W").Any(w =&gt; words.Contains(w))); </code></pre>
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    1. POHow to check if any word in my List<string> contains in text
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    1. USWorkSmarter
    1. USR. Martinho Fernandes
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    1. COI'd go with linq. You aren't escaping control characters in the regex.
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      1. USAdam Robinson
    2. COThe searching of a catentated string is different to 3 discrete searches, as the start and end word boundaries merge and may produce a false match.
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      1. USXhalent
    3. COthnx for your answer but can u advise me in case the words container is a datatable ?
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      1. USuser690069
 

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