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    <h1>Description</h1> <p>Based on your comments: <code>A word in this instance is:</code></p> <pre><code>a whole word without numbers doesn't start with a forward slash, or a back slash just letters only can include hyphen and apostrophes </code></pre> <p>The character class to cover all the word characters by your definition would be <code>[a-z'-]+</code> and that group could be surrounded by whitespace, or the start/end of a string. You sample also shows a comma so I'm presuming a word can be followed by a comma or dot either of which are followed by white space is ok too.</p> <p>This regex will:</p> <ul> <li>collect all substings defined as words <code>[a-z'-]+</code></li> <li>allow a comma or dot after a word, but not inside or at the start of a word</li> <li>rejects substrings from containing all hyphens</li> <li>rejects substrings from containing all apostrophes</li> <li>prevents words from having 3 or more hyphens</li> <li>prevents words from having 2 or more apostrophes</li> </ul> <p><code>(?:^|\s)(?![\\\/])(?!-+(?:\s|$))(?!'+(?:\s|$))(?!(?:[a-z'-]*?-){3,})(?!(?:[a-z'-]*?'){2,})[a-z'-]+[,.]?(?=\s|$)</code></p> <p><img src="https://i.stack.imgur.com/fg91R.png" alt="enter image description here"></p> <h1>Expanded explanation</h1> <ul> <li><code>(?:^|\s)</code> match the start of the string or a white space. This eliminates the need to test for word boundary which is problematic for strings like "abdc-egfh"</li> <li><code>(?![\\\/])</code> prevent the word from starting with a \ or /, however this is over kill as the character class doesn't allow it either</li> <li><code>(?!-+(?:\s|$))</code> prevent strings which are all hyphens</li> <li><code>(?!'+(?:\s|$))</code> prevent strings which are all apostrophes</li> <li><code>(?!(?:[a-z'-]*?-){3,})</code> prevent strings which have 3 or more hyphens</li> <li><code>(?!(?:[a-z'-]*?'){2,})</code> prevent strings which have 2 or more apostrophes</li> <li><code>[a-z'-]+[,.]?(?=\s|$)</code> match the word followed by some optional punctuation, and ensure this is followed by either a space or the end of a string</li> </ul> <h1>Examples</h1> <p>I'm not a C# programmer, but a returned array of matches from a code block like the one covered in question <a href="https://stackoverflow.com/questions/7417206/return-a-array-list-using-regex">Return a array/list using regex</a> and this regular expression will probably work for you. Note this expression does assume you'll use the case insensitive option.</p> <p><strong>Sample Text</strong></p> <pre><code>\DR1234 - this is a word, 123456, frank's place DA123 SW1 :50:/ one-hyphen two-hyphens-here I-have-three-hyphens </code></pre> <p><strong>Matches</strong></p> <pre><code>[0] =&gt; this [1] =&gt; is [2] =&gt; a [3] =&gt; word, [4] =&gt; frank's [5] =&gt; place [6] =&gt; one-hyphen [7] =&gt; two-hyphens-here </code></pre>
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    1. COHi Denomales, first off thanks for the detailed explanation. I ran your rege through Rubular, and it produced the following: http://rubular.com/r/mV2aTghkHU
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    2. COWhat is your tool to generate the regex?
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    3. COHey Daniel, I'm using debuggex.com. Although it doesn't support lookbehinds, named capture groups, or atomic groups it's still handy for understanding the expression flow. There is also regexper.com. They do a pretty good job too, but it's not real time as you're typing.
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