Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
No Match

r"
"
gx

Test String

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"url\(\s*[\'""]?([a-zA-Z0-9\.\/\-_]*\.(?:jpe?g|gif|png|css|ico|eot|woff|ttf|svg|xml|json))(\?{1}\S*)?[\'""]?\s*\)[^"; string input = @"@font-face{font-family:'FontAwesome';src:url('../fonts/fontawesome-webfont.eot?v=4.2.0');src:url('../fonts/fontawesome-webfont.eot?#iefix&v=4.2.0') format('embedded-opentype'),url('../fonts/fontawesome-webfont.woff?v=4.2.0') format('woff'),url('../fonts/fontawesome-webfont.ttf?v=4.2.0') format('truetype'),url('../fonts/fontawesome-webfont.svg?v=4.2.0#fontawesomeregular') format('svg');font-weight:normal;font-style:normal}.fa{display:inline-block;font:normal normal normal 14px/1 FontAwesome;font-size:inherit;text-rendering:auto;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.fa-lg{font-size:1.33333333em;line-height:.75em;vertical-align:-15%}.fa-2x{font-size:2em}.fa-3x{font-size:3em}.fa-4x{font-size:4em}.fa-5x{font-size:5em}.fa-fw{width:1.28571429em;text-align:center}.fa-ul{padding-left:0;margin-left:2.14285714em;list-style-type:none}.fa-ul>li{position:relative}.fa-li{position:absolute;left:-2.14285714em;width:2.14285714em;top:.14285714em;text-align:center}.fa-li.fa-lg{left:-1.85714286em}.fa-border{padding:.2em .25em .15em;border:solid .08em #eee;border-radius:.1em}.pull-right{float:right}.pull-left{float:left}.fa.pull-left{margin-right:.3em}.fa.pull-right{margin-left:.3em}.fa-spin{-webkit-animation:fa-spin 2s infinite linear;animation:fa-spin 2s infinite linear}@-webkit-keyframes fa-spin{0%{-webkit-transform:rotate(0deg);transform:rotate(0deg)}100%{-webkit-transform:rotate(359deg);transform:rotate(359deg)}}@keyframes fa-spin{0%{-webkit-transform:rotate(0deg);transform:rotate(0deg)}100%{-webkit-transform:rotate(359deg);transform:rotate(359deg)}}.fa-rotate-90{filter:progid:DXImageTransform.Microsoft.BasicImage(rotation=1);-webkit-transform:rotate(90deg);-ms-transform:rotate(90deg);transform:rotate(90deg)}.fa-rotate-180{filter:progid:DXImageTransform.Microsoft.BasicImage(rotation=2);-webkit-transform:rotate(180deg);-ms-transform:rotate(180deg);transform:rotate(180deg)}.fa-rotate-270{filter:progid:DXImageTransform.Microsoft.BasicImage(rotation=3);-webkit-transform:rotate(270deg);-ms-transform:rotate(270deg);transform:rotate(270deg)}.fa-flip-horizontal{filter:progid:DXImageTransform.Microsoft.BasicImage(rotation=0, mirror=1);-webkit-transform:scale(-1, 1);-ms-transform:scale(-1, 1);transform:scale(-1, 1)}.fa-flip-vertical{filter:progid:DXImageTransform.Microsoft.BasicImage(rotation=2, mirror=1);-webkit-transform:scale(1, -1);-ms-transform:scale(1, -1);transform:scale(1, -1)}:root .fa-rotate-90,:root .fa-rotate-180,:root .fa-rotate-270,:root .fa-flip-horizontal,:root .fa-flip-vertical{filter:none}.fa-stack{position:relative;display:inline-block;width:2em;height:2em;line-height:2em;vertical-align:middle}.fa-stack-1x,.fa-stack-2x{position:absolute;left:0;width:100%;text-align:center}.fa-stack-1x{line-height:inherit}.fa-stack-2x{font-size:2em}.fa-inverse{color:#fff}.fa-glass:before{content:""\f000""}.fa-music:before{content:""\f001""}.fa-search:before{content:""\f002""}.fa-envelope-o:before{content:""\f003""}.fa-heart:before{content:""\f004""}.fa-star:before{content:""\f005""}.fa-star-o:before{content:""\f006""}.fa-user:before{content:""\f007""}.fa-film:before{content:""\f008""}.fa-th-large:before{content:""\f009""}.fa-th:before{content:""\f00a""}.fa-th-list:before{content:""\f00b""}.fa-check:before{content:""\f00c""}.fa-remove:before,.fa-close:before,.fa-times:before{content:""\f00d""}.fa-search-plus:before{content:""\f00e""}.fa-search-minus:before{content:""\f010""}.fa-power-off:before{content:""\f011""}.fa-signal:before{content:""\f012""}.fa-gear:before,.fa-cog:before{content:""\f013""}.fa-trash-o:before{content:""\f014""}.fa-home:before{content:""\f015""}.fa-file-o:before{content:""\f016""}.fa-clock-o:before{content:""\f017""}.fa-road:before{content:""\f018""}.fa-download:before{content:""\f019""}.fa-arrow-circle-o-down:before{content:""\f01a""}.fa-arrow-circle-o-up:before{content:""\f01b""}.fa-inbox:before{content:""\f01c""}.fa-play-circle-o:before{content:""\f01d""}.fa-rotate-right:before,.fa-repeat:before{content:""\f01e""}.fa-refresh:before{content:""\f021""}.fa-list-alt:before{content:""\f022""}.fa-lock:before{content:""\f023""}.fa-flag:before{content:""\f024""}.fa-headphones:before{content:""\f025""}.fa-volume-off:before{content:""\f026""}.fa-volume-down:before{content:""\f027""}.fa-volume-up:before{content:""\f028""}.fa-qrcode:before{content:""\f029""}.fa-barcode:before{content:""\f02a""}.fa-tag:before{content:""\f02b""}.fa-tags:before{content:""\f02c""}.fa-book:before{content:""\f02d""}.fa-bookmark:before{content:""\f02e""}.fa-print:before{content:""\f02f""}.fa-camera:before{content:""\f030""}.fa-font:before{content:""\f031""}.fa-bold:before{content:""\f032""}.fa-italic:before{content:""\f033""}.fa-text-height:before{content:""\f034""}.fa-text-width:before{content:""\f035""}.fa-align-left:before{content:""\f036""}.fa-align-center:before{content:""\f037""}.fa-align-right:before{content:""\f038""}.fa-align-justify:before{content:""\f039""}.fa-list:before{content:""\f03a""}.fa-dedent:before,.fa-outdent:before{content:""\f03b""}.fa-indent:before{content:""\f03c""}.fa-video-camera:before{content:""\f03d""}.fa-photo:before,.fa-image:before,.fa-picture-o:before{content:""\f03e""}.fa-pencil:before{content:""\f040""}.fa-map-marker:before{content:""\f041""}.fa-adjust:before{content:""\f042""}.fa-tint:before{content:""\f043""}.fa-edit:before,.fa-pencil-square-o:before{content:""\f044""}.fa-share-square-o:before{content:""\f045""}.fa-check-square-o:before{content:""\f046""}.fa-arrows:before{content:""\f047""}.fa-step-backward:before{content:""\f048""}.fa-fast-backward:before{content:""\f049""}.fa-backward:before{content:""\f04a""}.fa-play:before{content:""\f04b""}.fa-pause:before{content:""\f04c""}.fa-stop:before{content:""\f04d""}.fa-forward:before{content:""\f04e""}.fa-fast-forward:before{content:""\f050""}.fa-step-forward:before{content:""\f051""}.fa-eject:before{content:""\f052""}.fa-chevron-left:before{content:""\f053""}.fa-chevron-right:before{content:""\f054""}.fa-plus-circle:before{content:""\f055""}.fa-minus-circle:before{content:""\f056""}.fa-times-circle:before{content:""\f057""}.fa-check-circle:before{content:""\f058""}.fa-question-circle:before{content:""\f059""}.fa-info-circle:before{content:""\f05a""}.fa-crosshairs:before{content:""\f05b""}.fa-times-circle-o:before{content:""\f05c""}.fa-check-circle-o:before{content:""\f05d""}.fa-ban:before{content:""\f05e""}.fa-arrow-left:before{content:""\f060""}.fa-arrow-right:before{content:""\f061""}.fa-arrow-up:before{content:""\f062""}.fa-arrow-down:before{content:""\f063""}.fa-mail-forward:before,.fa-share:before{content:""\f064""}.fa-expand:before{content:""\f065""}.fa-compress:before{content:""\f066""}.fa-plus:before{content:""\f067""}.fa-minus:before{content:""\f068""}.fa-asterisk:before{content:""\f069""}.fa-exclamation-circle:before{content:""\f06a""}.fa-gift:before{content:""\f06b""}.fa-leaf:before{content:""\f06c""}.fa-fire:before{content:""\f06d""}.fa-eye:before{content:""\f06e""}.fa-eye-slash:before{content:""\f070""}.fa-warning:before,.fa-exclamation-triangle:before{content:""\f071""}.fa-plane:before{content:""\f072""}.fa-calendar:before{content:""\f073""}.fa-random:before{content:""\f074""}.fa-comment:before{content:""\f075""}.fa-magnet:before{content:""\f076""}.fa-chevron-up:before{content:""\f077""}.fa-chevron-down:before{content:""\f078""}.fa-retweet:before{content:""\f079""}.fa-shopping-cart:before{content:""\f07a""}.fa-folder:before{content:""\f07b""}.fa-folder-open:before{content:""\f07c""}.fa-arrows-v:before{content:""\f07d""}.fa-arrows-h:before{content:""\f07e""}.fa-bar-chart-o:before,.fa-bar-chart:before{content:""\f080""}.fa-twitter-square:before{content:""\f081""}.fa-facebook-square:before{content:""\f082""}.fa-camera-retro:before{content:""\f083""}.fa-key:before{content:""\f084""}.fa-gears:before,.fa-cogs:before{content:""\f085""}.fa-comments:before{content:""\f086""}.fa-thumbs-o-up:before{content:""\f087""}.fa-thumbs-o-down:before{content:""\f088""}.fa-star-half:before{content:""\f089""}.fa-heart-o:before{content:""\f08a""}.fa-sign-out:before{content:""\f08b""}.fa-linkedin-square:before{content:""\f08c""}.fa-thumb-tack:before{content:""\f08d""}.fa-external-link:before{content:""\f08e""}.fa-sign-in:before{content:""\f090""}.fa-trophy:before{content:""\f091""}.fa-github-square:before{content:""\f092""}.fa-upload:before{content:""\f093""}.fa-lemon-o:before{content:""\f094""}.fa-phone:before{content:""\f095""}.fa-square-o:before{content:""\f096""}.fa-bookmark-o:before{content:""\f097""}.fa-phone-square:before{content:""\f098""}.fa-twitter:before{content:""\f099""}.fa-facebook:before{content:""\f09a""}.fa-github:before{content:""\f09b""}.fa-unlock:before{content:""\f09c""}.fa-credit-card:before{content:""\f09d""}.fa-rss:before{content:""\f09e""}.fa-hdd-o:before{content:""\f0a0""}.fa-bullhorn:before{content:""\f0a1""}.fa-bell:before{content:""\f0f3""}.fa-certificate:before{content:""\f0a3""}.fa-hand-o-right:before{content:""\f0a4""}.fa-hand-o-left:before{content:""\f0a5""}.fa-hand-o-up:before{content:""\f0a6""}.fa-hand-o-down:before{content:""\f0a7""}.fa-arrow-circle-left:before{content:""\f0a8""}.fa-arrow-circle-right:before{content:""\f0a9""}.fa-arrow-circle-up:before{content:""\f0aa""}.fa-arrow-circle-down:before{content:""\f0ab""}.fa-globe:before{content:""\f0ac""}.fa-wrench:before{content:""\f0ad""}.fa-tasks:before{content:""\f0ae""}.fa-filter:before{content:""\f0b0""}.fa-briefcase:before{content:""\f0b1""}.fa-arrows-alt:before{content:""\f0b2""}.fa-group:before,.fa-users:before{content:""\f0c0""}.fa-chain:before,.fa-link:before{content:""\f0c1""}.fa-cloud:before{content:""\f0c2""}.fa-flask:before{content:""\f0c3""}.fa-cut:before,.fa-scissors:before{content:""\f0c4""}.fa-copy:before,.fa-files-o:before{content:""\f0c5""}.fa-paperclip:before{content:""\f0c6""}.fa-save:before,.fa-floppy-o:before{content:""\f0c7""}.fa-square:before{content:""\f0c8""}.fa-navicon:before,.fa-reorder:before,.fa-bars:before{content:""\f0c9""}.fa-list-ul:before{content:""\f0ca""}.fa-list-ol:before{content:""\f0cb""}.fa-strikethrough:before{content:""\f0cc""}.fa-underline:before{content:""\f0cd""}.fa-table:before{content:""\f0ce""}.fa-magic:before{content:""\f0d0""}.fa-truck:before{content:""\f0d1""}.fa-pinterest:before{content:""\f0d2""}.fa-pinterest-square:before{content:""\f0d3""}.fa-google-plus-square:before{content:""\f0d4""}.fa-google-plus:before{content:""\f0d5""}.fa-money:before{content:""\f0d6""}.fa-caret-down:before{content:""\f0d7""}.fa-caret-up:before{content:""\f0d8""}.fa-caret-left:before{content:""\f0d9""}.fa-caret-right:before{content:""\f0da""}.fa-columns:before{content:""\f0db""}.fa-unsorted:before,.fa-sort:before{content:""\f0dc""}.fa-sort-down:before,.fa-sort-desc:before{content:""\f0dd""}.fa-sort-up:before,.fa-sort-asc:before{content:""\f0de""}.fa-envelope:before{content:""\f0e0""}.fa-linkedin:before{content:""\f0e1""}.fa-rotate-left:before,.fa-undo:before{content:""\f0e2""}.fa-legal:before,.fa-gavel:before{content:""\f0e3""}.fa-dashboard:before,.fa-tachometer:before{content:""\f0e4""}.fa-comment-o:before{content:""\f0e5""}.fa-comments-o:before{content:""\f0e6""}.fa-flash:before,.fa-bolt:before{content:""\f0e7""}.fa-sitemap:before{content:""\f0e8""}.fa-umbrella:before{content:""\f0e9""}.fa-paste:before,.fa-clipboard:before{content:""\f0ea""}.fa-lightbulb-o:before{content:""\f0eb""}.fa-exchange:before{content:""\f0ec""}.fa-cloud-download:before{content:""\f0ed""}.fa-cloud-upload:before{content:""\f0ee""}.fa-user-md:before{content:""\f0f0""}.fa-stethoscope:before{content:""\f0f1""}.fa-suitcase:before{content:""\f0f2""}.fa-bell-o:before{content:""\f0a2""}.fa-coffee:before{content:""\f0f4""}.fa-cutlery:before{content:""\f0f5""}.fa-file-text-o:before{content:""\f0f6""}.fa-building-o:before{content:""\f0f7""}.fa-hospital-o:before{content:""\f0f8""}.fa-ambulance:before{content:""\f0f9""}.fa-medkit:before{content:""\f0fa""}.fa-fighter-jet:before{content:""\f0fb""}.fa-beer:before{content:""\f0fc""}.fa-h-square:before{content:""\f0fd""}.fa-plus-square:before{content:""\f0fe""}.fa-angle-double-left:before{content:""\f100""}.fa-angle-double-right:before{content:""\f101""}.fa-angle-double-up:before{content:""\f102""}.fa-angle-double-down:before{content:""\f103""}.fa-angle-left:before{content:""\f104""}.fa-angle-right:before{content:""\f105""}.fa-angle-up:before{content:""\f106""}.fa-angle-down:before{content:""\f107""}.fa-desktop:before{content:""\f108""}.fa-laptop:before{content:""\f109""}.fa-tablet:before{content:""\f10a""}.fa-mobile-phone:before,.fa-mobile:before{content:""\f10b""}.fa-circle-o:before{content:""\f10c""}.fa-quote-left:before{content:""\f10d""}.fa-quote-right:before{content:""\f10e""}.fa-spinner:before{content:""\f110""}.fa-circle:before{content:""\f111""}.fa-mail-reply:before,.fa-reply:before{content:""\f112""}.fa-github-alt:before{content:""\f113""}.fa-folder-o:before{content:""\f114""}.fa-folder-open-o:before{content:""\f115""}.fa-smile-o:before{content:""\f118""}.fa-frown-o:before{content:""\f119""}.fa-meh-o:before{content:""\f11a""}.fa-gamepad:before{content:""\f11b""}.fa-keyboard-o:before{content:""\f11c""}.fa-flag-o:before{content:""\f11d""}.fa-flag-checkered:before{content:""\f11e""}.fa-terminal:before{content:""\f120""}.fa-code:before{content:""\f121""}.fa-mail-reply-all:before,.fa-reply-all:before{content:""\f122""}.fa-star-half-empty:before,.fa-star-half-full:before,.fa-star-half-o:before{content:""\f123""}.fa-location-arrow:before{content:""\f124""}.fa-crop:before{content:""\f125""}.fa-code-fork:before{content:""\f126""}.fa-unlink:before,.fa-chain-broken:before{content:""\f127""}.fa-question:before{content:""\f128""}.fa-info:before{content:""\f129""}.fa-exclamation:before{content:""\f12a""}.fa-superscript:before{content:""\f12b""}.fa-subscript:before{content:""\f12c""}.fa-eraser:before{content:""\f12d""}.fa-puzzle-piece:before{content:""\f12e""}.fa-microphone:before{content:""\f130""}.fa-microphone-slash:before{content:""\f131""}.fa-shield:before{content:""\f132""}.fa-calendar-o:before{content:""\f133""}.fa-fire-extinguisher:before{content:""\f134""}.fa-rocket:before{content:""\f135""}.fa-maxcdn:before{content:""\f136""}.fa-chevron-circle-left:before{content:""\f137""}.fa-chevron-circle-right:before{content:""\f138""}.fa-chevron-circle-up:before{content:""\f139""}.fa-chevron-circle-down:before{content:""\f13a""}.fa-html5:before{content:""\f13b""}.fa-css3:before{content:""\f13c""}.fa-anchor:before{content:""\f13d""}.fa-unlock-alt:before{content:""\f13e""}.fa-bullseye:before{content:""\f140""}.fa-ellipsis-h:before{content:""\f141""}.fa-ellipsis-v:before{content:""\f142""}.fa-rss-square:before{content:""\f143""}.fa-play-circle:before{content:""\f144""}.fa-ticket:before{content:""\f145""}.fa-minus-square:before{content:""\f146""}.fa-minus-square-o:before{content:""\f147""}.fa-level-up:before{content:""\f148""}.fa-level-down:before{content:""\f149""}.fa-check-square:before{content:""\f14a""}.fa-pencil-square:before{content:""\f14b""}.fa-external-link-square:before{content:""\f14c""}.fa-share-square:before{content:""\f14d""}.fa-compass:before{content:""\f14e""}.fa-toggle-down:before,.fa-caret-square-o-down:before{content:""\f150""}.fa-toggle-up:before,.fa-caret-square-o-up:before{content:""\f151""}.fa-toggle-right:before,.fa-caret-square-o-right:before{content:""\f152""}.fa-euro:before,.fa-eur:before{content:""\f153""}.fa-gbp:before{content:""\f154""}.fa-dollar:before,.fa-usd:before{content:""\f155""}.fa-rupee:before,.fa-inr:before{content:""\f156""}.fa-cny:before,.fa-rmb:before,.fa-yen:before,.fa-jpy:before{content:""\f157""}.fa-ruble:before,.fa-rouble:before,.fa-rub:before{content:""\f158""}.fa-won:before,.fa-krw:before{content:""\f159""}.fa-bitcoin:before,.fa-btc:before{content:""\f15a""}.fa-file:before{content:""\f15b""}.fa-file-text:before{content:""\f15c""}.fa-sort-alpha-asc:before{content:""\f15d""}.fa-sort-alpha-desc:before{content:""\f15e""}.fa-sort-amount-asc:before{content:""\f160""}.fa-sort-amount-desc:before{content:""\f161""}.fa-sort-numeric-asc:before{content:""\f162""}.fa-sort-numeric-desc:before{content:""\f163""}.fa-thumbs-up:before{content:""\f164""}.fa-thumbs-down:before{content:""\f165""}.fa-youtube-square:before{content:""\f166""}.fa-youtube:before{content:""\f167""}.fa-xing:before{content:""\f168""}.fa-xing-square:before{content:""\f169""}.fa-youtube-play:before{content:""\f16a""}.fa-dropbox:before{content:""\f16b""}.fa-stack-overflow:before{content:""\f16c""}.fa-instagram:before{content:""\f16d""}.fa-flickr:before{content:""\f16e""}.fa-adn:before{content:""\f170""}.fa-bitbucket:before{content:""\f171""}.fa-bitbucket-square:before{content:""\f172""}.fa-tumblr:before{content:""\f173""}.fa-tumblr-square:before{content:""\f174""}.fa-long-arrow-down:before{content:""\f175""}.fa-long-arrow-up:before{content:""\f176""}.fa-long-arrow-left:before{content:""\f177""}.fa-long-arrow-right:before{content:""\f178""}.fa-apple:before{content:""\f179""}.fa-windows:before{content:""\f17a""}.fa-android:before{content:""\f17b""}.fa-linux:before{content:""\f17c""}.fa-dribbble:before{content:""\f17d""}.fa-skype:before{content:""\f17e""}.fa-foursquare:before{content:""\f180""}.fa-trello:before{content:""\f181""}.fa-female:before{content:""\f182""}.fa-male:before{content:""\f183""}.fa-gittip:before{content:""\f184""}.fa-sun-o:before{content:""\f185""}.fa-moon-o:before{content:""\f186""}.fa-archive:before{content:""\f187""}.fa-bug:before{content:""\f188""}.fa-vk:before{content:""\f189""}.fa-weibo:before{content:""\f18a""}.fa-renren:before{content:""\f18b""}.fa-pagelines:before{content:""\f18c""}.fa-stack-exchange:before{content:""\f18d""}.fa-arrow-circle-o-right:before{content:""\f18e""}.fa-arrow-circle-o-left:before{content:""\f190""}.fa-toggle-left:before,.fa-caret-square-o-left:before{content:""\f191""}.fa-dot-circle-o:before{content:""\f192""}.fa-wheelchair:before{content:""\f193""}.fa-vimeo-square:before{content:""\f194""}.fa-turkish-lira:before,.fa-try:before{content:""\f195""}.fa-plus-square-o:before{content:""\f196""}.fa-space-shuttle:before{content:""\f197""}.fa-slack:before{content:""\f198""}.fa-envelope-square:before{content:""\f199""}.fa-wordpress:before{content:""\f19a""}.fa-openid:before{content:""\f19b""}.fa-institution:before,.fa-bank:before,.fa-university:before{content:""\f19c""}.fa-mortar-board:before,.fa-graduation-cap:before{content:""\f19d""}.fa-yahoo:before{content:""\f19e""}.fa-google:before{content:""\f1a0""}.fa-reddit:before{content:""\f1a1""}.fa-reddit-square:before{content:""\f1a2""}.fa-stumbleupon-circle:before{content:""\f1a3""}.fa-stumbleupon:before{content:""\f1a4""}.fa-delicious:before{content:""\f1a5""}.fa-digg:before{content:""\f1a6""}.fa-pied-piper:before{content:""\f1a7""}.fa-pied-piper-alt:before{content:""\f1a8""}.fa-drupal:before{content:""\f1a9""}.fa-joomla:before{content:""\f1aa""}.fa-language:before{content:""\f1ab""}.fa-fax:before{content:""\f1ac""}.fa-building:before{content:""\f1ad""}.fa-child:before{content:""\f1ae""}.fa-paw:before{content:""\f1b0""}.fa-spoon:before{content:""\f1b1""}.fa-cube:before{content:""\f1b2""}.fa-cubes:before{content:""\f1b3""}.fa-behance:before{content:""\f1b4""}.fa-behance-square:before{content:""\f1b5""}.fa-steam:before{content:""\f1b6""}.fa-steam-square:before{content:""\f1b7""}.fa-recycle:before{content:""\f1b8""}.fa-automobile:before,.fa-car:before{content:""\f1b9""}.fa-cab:before,.fa-taxi:before{content:""\f1ba""}.fa-tree:before{content:""\f1bb""}.fa-spotify:before{content:""\f1bc""}.fa-deviantart:before{content:""\f1bd""}.fa-soundcloud:before{content:""\f1be""}.fa-database:before{content:""\f1c0""}.fa-file-pdf-o:before{content:""\f1c1""}.fa-file-word-o:before{content:""\f1c2""}.fa-file-excel-o:before{content:""\f1c3""}.fa-file-powerpoint-o:before{content:""\f1c4""}.fa-file-photo-o:before,.fa-file-picture-o:before,.fa-file-image-o:before{content:""\f1c5""}.fa-file-zip-o:before,.fa-file-archive-o:before{content:""\f1c6""}.fa-file-sound-o:before,.fa-file-audio-o:before{content:""\f1c7""}.fa-file-movie-o:before,.fa-file-video-o:before{content:""\f1c8""}.fa-file-code-o:before{content:""\f1c9""}.fa-vine:before{content:""\f1ca""}.fa-codepen:before{content:""\f1cb""}.fa-jsfiddle:before{content:""\f1cc""}.fa-life-bouy:before,.fa-life-buoy:before,.fa-life-saver:before,.fa-support:before,.fa-life-ring:before{content:""\f1cd""}.fa-circle-o-notch:before{content:""\f1ce""}.fa-ra:before,.fa-rebel:before{content:""\f1d0""}.fa-ge:before,.fa-empire:before{content:""\f1d1""}.fa-git-square:before{content:""\f1d2""}.fa-git:before{content:""\f1d3""}.fa-hacker-news:before{content:""\f1d4""}.fa-tencent-weibo:before{content:""\f1d5""}.fa-qq:before{content:""\f1d6""}.fa-wechat:before,.fa-weixin:before{content:""\f1d7""}.fa-send:before,.fa-paper-plane:before{content:""\f1d8""}.fa-send-o:before,.fa-paper-plane-o:before{content:""\f1d9""}.fa-history:before{content:""\f1da""}.fa-circle-thin:before{content:""\f1db""}.fa-header:before{content:""\f1dc""}.fa-paragraph:before{content:""\f1dd""}.fa-sliders:before{content:""\f1de""}.fa-share-alt:before{content:""\f1e0""}.fa-share-alt-square:before{content:""\f1e1""}.fa-bomb:before{content:""\f1e2""}.fa-soccer-ball-o:before,.fa-futbol-o:before{content:""\f1e3""}.fa-tty:before{content:""\f1e4""}.fa-binoculars:before{content:""\f1e5""}.fa-plug:before{content:""\f1e6""}.fa-slideshare:before{content:""\f1e7""}.fa-twitch:before{content:""\f1e8""}.fa-yelp:before{content:""\f1e9""}.fa-newspaper-o:before{content:""\f1ea""}.fa-wifi:before{content:""\f1eb""}.fa-calculator:before{content:""\f1ec""}.fa-paypal:before{content:""\f1ed""}.fa-google-wallet:before{content:""\f1ee""}.fa-cc-visa:before{content:""\f1f0""}.fa-cc-mastercard:before{content:""\f1f1""}.fa-cc-discover:before{content:""\f1f2""}.fa-cc-amex:before{content:""\f1f3""}.fa-cc-paypal:before{content:""\f1f4""}.fa-cc-stripe:before{content:""\f1f5""}.fa-bell-slash:before{content:""\f1f6""}.fa-bell-slash-o:before{content:""\f1f7""}.fa-trash:before{content:""\f1f8""}.fa-copyright:before{content:""\f1f9""}.fa-at:before{content:""\f1fa""}.fa-eyedropper:before{content:""\f1fb""}.fa-paint-brush:before{content:""\f1fc""}.fa-birthday-cake:before{content:""\f1fd""}.fa-area-chart:before{content:""\f1fe""}.fa-pie-chart:before{content:""\f200""}.fa-line-chart:before{content:""\f201""}.fa-lastfm:before{content:""\f202""}.fa-lastfm-square:before{content:""\f203""}.fa-toggle-off:before{content:""\f204""}.fa-toggle-on:before{content:""\f205""}.fa-bicycle:before{content:""\f206""}.fa-bus:before{content:""\f207""}.fa-ioxhost:before{content:""\f208""}.fa-angellist:before{content:""\f209""}.fa-cc:before{content:""\f20a""}.fa-shekel:before,.fa-sheqel:before,.fa-ils:before{content:""\f20b""}.fa-meanpath:before{content:""\f20c""}"; RegexOptions options = RegexOptions.IgnorePatternWhitespace; foreach (Match m in Regex.Matches(input, pattern, options)) { Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index); } } }

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx