using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"<[^>]+>";
string input = @"
<!DOCTYPE html>
<html xmlns=""http://www.w3.org/1999/xhtml"" xml:lang=""en"" lang=""en"">
<head>
<title>Online regex tester and debugger: JavaScript, Python, PHP, and PCRE</title>
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<meta charset=""utf-8"">
<meta name=""viewport"" content=""width=device-width, initial-scale=1, maximum-scale=1"">
<meta name=""keywords"" content=""javascript,regex,regular expression,debugger,explainer,helper,tester,match,pcre,python,editor"">
<meta name=""description"" content=""Online regex tester, debugger with highlighting for PHP, PCRE, Python and JavaScript."">
<meta name=""author"" content=""Firas Dib"">
<meta property=""twitter:card"" content=""summary"">
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<meta property=""twitter:title"" content=""Regex101 - online regex editor and debugger"">
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<i class=""fa fa-circle fa-stack-2x""></i>
<i class=""fa fa-wrench fa-stack-1x""></i>
</span>
<span class=""fa-stack fa-lg"" id=""sign_in_out"" title=""Sign in"">
<i class=""fa fa-circle fa-stack-2x""></i>
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<h1 id=""logo"">
<a href=""/"">
<div id=""large_header""><span class=""part1"">regular</span> <span class=""part2"">expressions</span> <span class=""part3"">101</span></div>
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</a>
</h1>
<ul id=""header_nav"">
<li class=""fullscreen header_nav active main_menu main"" data-id=""40"">
<i class=""fa fa-terminal""></i><span class=""large_menu"">Regex Tester</span>
</li>
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<i class=""fa fa-comments""></i><span class=""large_menu"">IRC</span>
</a>
</li>
</ul>
</div>
</div>
</div>
<div id=""settings_popup_contents"">
<div class=""left"">
<div class=""label""><i class=""fa fa-gear settings""></i> General Settings</div>
<input type=""checkbox"" id=""display_whitespace"" name=""display_whitespace"" tabindex=""999"" value=""1"" data-id=""1"">
<label class=""design_label"" for=""display_whitespace"">
<span></span>Display Whitespace
</label>
<input type=""checkbox"" id=""small_menu"" name=""small_menu"" tabindex=""999"" value=""1"" data-id=""201"">
<label class=""design_label"" for=""small_menu"">
<span></span>Use minimal view
</label>
<div class=""label""><i class=""fa fa-picture-o theme""></i> Theme</div>
<input type=""radio"" id=""light_theme"" name=""theme"" tabindex=""999"" value=""1"" data-id=""203"" checked=""checked"">
<label class=""design_label"" for=""light_theme"">
<span></span>Use light theme
</label>
<input type=""radio"" id=""dark_theme"" name=""theme"" tabindex=""999"" value=""1"" data-id=""200"">
<label class=""design_label"" for=""dark_theme"">
<span></span>Use dark theme
</label>
</div>
<div class=""right"">
<div id=""colorizer_themes"">
<div class=""label""><i class=""fa fa-terminal regex""></i> Regex Settings</div>
<input type=""checkbox"" id=""colorize_regex"" name=""colorize_regex"" tabindex=""999"" value=""1"" data-id=""9"">
<label class=""design_label"" for=""colorize_regex"">
<span></span>Colorize syntax
</label>
<div class=""select_themes"">
<strong>Theme:</strong>
<select class=""light_themes"" data-id=""999"">
<option value=""default"">Default</option>
<option value=""default_light"">Default - Light</option>
</select><select class=""dark_themes"" data-id=""999"">
<option value=""default"">Default</option>
</select>
</div>
<input type=""checkbox"" id=""smart_completion"" name=""smart_completion"" tabindex=""999"" value=""1"" data-id=""210"">
<label class=""design_label"" for=""smart_completion"">
<span></span>Enable smart auto-completion
</label>
<input type=""checkbox"" id=""wrap_newlines"" name=""wrap_newlines"" tabindex=""999"" value=""1"" data-id=""10"">
<label class=""design_label"" for=""wrap_newlines"">
<span></span>Wrap long lines
</label>
<input type=""checkbox"" id=""highlight_interaction"" name=""highlight_interaction"" tabindex=""999"" value=""0"" data-id=""220"">
<label class=""design_label"" for=""highlight_interaction"">
<span></span>Highlight groups
</label>
<input type=""checkbox"" id=""display_nonpart"" name=""display_nonpart"" tabindex=""999"" value=""0"" data-id=""221"">
<label class=""design_label"" for=""display_nonpart"">
<span></span>Show non-participating groups
</label>
<div class=""execution_limit"">
<label class=""design_label"" for=""execution_limit"">Max execution time:</label>
<input type=""text"" name=""execution_limit"" id=""execution_limit"" placeholder=""2000""><em>ms</em>
</div>
</div>
<!--li id=""dark_theme"" data-id=""200"" class=""menu_item"">
<i class=""fa fa-picture-o""></i><span class=""large_menu"">Use dark theme</span>
</li-->
</div>
<div class=""arrow-box-tip reverse""></div>
</div>
<div class=""denial_of_service"" id=""splash"">
<div>
Initializing editor, please stand by... <i class=""fa fa-cog fa-spin""></i>
</div>
</div>
<div class=""denial_of_service"" id=""loading_screen"">
<div>
Loading content, please hold... <i class=""fa fa-cog fa-spin""></i>
</div>
</div>
<noscript>
<div class=""denial_of_service"">
<div>
It seems like you have JavaScript disabled, rendering this website virtually useless.
Please enable JavaScript to use this service. If you don't know how, try <a href=""http://enable-javascript.com/"">this</a>.
</div>
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<div class=""denial_of_service"" id=""old_browser"">
<div>You seem to be using an outdated version of your browser which is no longer supported by <strong>regex101.com</strong>. It is highly recommended that you upgrade your browser. Sorry for the inconvenience.</div>
</div>
<div id=""inline_menu"" class=""box_overflow_fix general_menu"">
<ul class=""first-ul overflow_handler"">
<li class=""regex_menu extension_menu share_menu"">
<ul>
<li class=""menu_notice"">Save & Share</li>
<li id=""permalink_menu"" class=""menu_item disabled"" data-id=""3"" data-permalink="" data-version="">
<i class=""fa fa-save""></i><span class=""large_menu"">Save Regex (CTRL+S)</span>
</li>
<li id=""permalink_fork"" class=""menu_item"" data-id=""900"" style=""display: none;"">
<i class=""fa fa-code-fork""></i><span class=""large_menu"">Fork Regex</span>
</li>
<li class=""menu_item unique disabled"" data-id=""4"" id=""community_submit"">
<i class=""fa fa-cloud-upload""></i><span class=""large_menu"">Add to Regex Library</span>
</li>
</ul>
</li>
<li class=""regex_menu extension_menu no_top_space"">
<ul>
<li class=""menu_notice"">Flavor</li>
<li class=""flavor_pcre menu_item active"" data-id=""20"">
<span class=""mini_menu"">PCRE</span>
<span class=""large_menu""><i class=""fa fa-file""></i>PCRE (PHP)</span>
</li>
<li class=""flavor_js menu_item "" data-id=""21"">
<span class=""mini_menu"">JS</span>
<span class=""large_menu""><i class=""fa fa-file""></i>JavaScript</span>
</li>
<li class=""flavor_python menu_item "" data-id=""22"">
<span class=""mini_menu"">PY</span>
<span class=""large_menu""><i class=""fa fa-file""></i>Python</span>
</li>
</ul>
</li>
<li class=""regex_menu extension_menu"" id=""tools_menu"">
<ul>
<li class=""menu_notice"">Tools</li>
<li class=""menu_item"" data-id=""50"" id=""format_regex"">
<i class=""fa fa-indent""></i><span class=""large_menu"">Format Regex (requires free-spacing, /x)</span>
</li>
<li class=""menu_item unique fullscreen disabled menu_toggle"" data-id=""8"" id=""sample_menu"">
<i class=""fa fa-code""></i><span class=""large_menu"">Code Generator</span>
</li>
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<i class=""fa fa-bug""></i><span class=""large_menu"">Regex Debugger</span>
</li>
<li class=""menu_item menu_toggle"" data-id=""99"" id=""unit_tests"">
<i class=""fa fa-check""></i><span class=""large_menu""><span class=""unit_test_player""><i class=""fa fa-play run_tests"" title=""Run tests (CTRL+K)""></i><span class=""unit_result"">n/a</span><span class=""unit_progress""></span></span><span class=""text_overflow"">Unit tests</span></span>
</li>
</ul>
</li>
<li id=""filter_menu"" class=""extension_menu community_menu no_top_space"">
<ul>
<li class=""menu_notice"">Filter flavors</li>
<li class=""flavor_pcre menu_item active"" data-id=""100"" data-flavor-id=""1"">
<span class=""mini_menu"">PCRE</span>
<span class=""large_menu""><i class=""fa fa-file""></i>PCRE (PHP)</span>
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</ul>
</li>
</ul>
</div>
<div id=""content"">
<div id=""community"" class=""box_overflow_fix extension_window""></div>
<div id=""account"" class=""box_overflow_fix extension_window""></div>
<div id=""regex_editor"" class=""box_overflow_fix"">
<div id=""code_samples"" class=""extension_window box_overflow_fix overflow_handler""></div>
<div id=""regex_debugger"" class=""box_overflow_fix extension_window"">
<div id=""regex_debugger_bg"" class=""box_overflow_fix"">
<div class=""label"" id=""debugger_label"">Status: Fetching debug info...</div>
<div id=""label_container"" class=""monospace"">
<input type=""checkbox"" id=""show_regex_pos"" name=""show_regex_pos"" tabindex=""999"" value=""1"" checked=""checked""/>
<label class=""design_label"" for=""show_regex_pos"">
<span></span>Display position in pattern
</label>
<input type=""checkbox"" id=""internal_opt"" name=""internal_opt"" tabindex=""999"" value=""1""/>
<label class=""design_label"" for=""internal_opt"">
<span></span>Disable internal engine optimizations
</label>
<a href=""#"" id=""debugger_collapse"">collapse all</a>
</div>
</div>
<div id=""regex_debugger_window"" class=""overflow_handler"">
<div class=""debugger_loader_padding""></div>
</div>
</div>
<div id=""main_editor"" class=""flex-container box_overflow_fix"">
<div id=""regex_container"" class=""flex-regex box_overflow_fix"">
<label for=""regex"">
Regular Expression
<div id=""version_container"" style=""display: none;"">
—
<select id=""version_selector"">
</select>
</div>
<span id=""result_indicator"" class=""no_match"">no match</span>
</label>
<div id=""regex_input"" class=""box_overflow_fix richtext_parent"">
<div id=""delimiter_selector"" class=""richtext_left slash_menu slash box_overflow_fix"" data-dropdown="".delimiter-dropdown"">/</div>
<div class=""richtext_right"">
<div class=""slash slash_menu"" data-dropdown="".delimiter-dropdown"">/</div><!--
--><div id=""options_container"">
<input data-focus=""#options_container"" value="" id=""options"" name=""options"" size=""20"" tabindex=""2"" type=""text"" placeholder=""gmixXsuUAJ""/>
<i id=""options_helper"" class=""fa fa-question-circle""></i>
</div>
<div id=""options_helper_contents""></div>
</div>
<div class=""richtext_padding"">
<div class=""richtext_container"" id=""richtext_regex_container"">
<div class=""richtext"" id=""richtext_regex"">
<pre><span class=""colorizer_height""></span><br/></pre>
<pre id=""regex_colors""><span></span><br/></pre>
<textarea data-focus=""#richtext_regex_container"" spellcheck=""false"" id=""regex"" name=""regex"" tabindex=""1"" rows=""1"" cols=""50"" placeholder=""insert your regular expression here"" autofocus=""autofocus""></textarea>
</div>
</div>
</div>
</div>
</div>
<div id=""test_result_container"" class=""box_overflow_fix flex-text "">
<label for=""regex_string"">Test string</label>
<div class=""overflow_handler flex-grow"">
<div class=""richtext"" id=""richtext_test"">
<pre><span id=""richtext_test_size""></span><br> </pre>
<pre id=""richtext_test_colors""><span id=""test_color_element""></span><br></pre>
<textarea wrap=""off"" data-focus=""#test_result_container .overflow_handler"" spellcheck=""false"" id=""regex_string"" class=""box_overflow_fix"" name=""test"" rows=""10"" tabindex=""3"" placeholder=""insert your test string here""></textarea>
</div>
</div>
</div>
<div id=""subst_parent"" class=""box_overflow_fix flex-sub "">
<label for=""sub"" class=""expander collapsed"">
<span class=""fa fa-plus-circle""></span>Substitution
</label>
<div id=""subst_container"" class=""overflow_handler flex-grow"">
<input class=""box_overflow_fix"" value="" id=""sub"" name=""sub"" tabindex=""3"" type=""text"" placeholder=""substitution; \num = backreference, \n = newline, \t = tab"">
<div id=""subst_area"" class=""overflow_handler flex-grow"">
<div contenteditable=""true"" id=""subst_result"" class=""monospace hard_break box_overflow_fix""></div>
</div>
</div>
</div>
<div id=""unit_tests_builder"" class=""box_overflow_fix flex-unit-builder"">
<div class=""label"">Create test<div class=""right""><a href=""#"" class=""button"" tabindex=""23"">Add test</a></div></div>
<div id=""unit_test_creator"" class=""box_overflow_fix"">
<div class=""test_builder"">
<div class=""the_test pt1"">
<div class=""left"">given the string</div>
<div class=""right""><textarea tabindex=""19"" class=""box_overflow_fix"" id=""unit_data"" placeholder=""test string""></textarea></div>
</div>
<div class=""the_test pt2"">
<div class=""left""><span>assert that</span><select id=""unit_type"" tabindex=""20""></select><select tabindex=""21"" id=""assert_type""></select></div>
<div class=""right""><textarea tabindex=""22"" class=""box_overflow_fix"" id=""assert_equals"" type=""text"" placeholder=""string value""></textarea></div>
</div>
</div>
</div>
</div>
<div id=""unit_tests_list"" class=""box_overflow_fix flex-unit-list"">
<div class=""label"">Test list<div class=""right unit_test_player""><i class=""fa fa-play run_tests"" title=""Run tests (CTRL+K)""></i><span class=""unit_result"">n/a</span></div></div>
<div id=""unit_test_window"" class=""unit_test_window flex-grow overflow_handler"">
<div class=""all_tests"">
<div id=""unit_test_container"">
</div>
</div>
</div>
</div>
</div>
<div id=""regex_treeview"" class=""box_overflow_fix"">
<div id=""treeview_resizer"" title=""Keep dragging""><div></div></div>
<div id=""treeview_content"" class=""box_overflow_fix flex-container"">
<div id=""scroll_treeview"" class=""box_overflow_fix flex-elem"">
<div id=""explainer_label"" class=""label expander"">
<span class=""fa""></span>Explanation
</div>
<div class=""overflow_handler box_overflow_fix flex-grow"">
<div id=""treeview"" style=""height: 100%"">
An explanation of your regex will be automatically generated as you type.
</div>
</div>
</div>
<div id=""scroll_match"" class=""box_overflow_fix flex-elem"">
<div id=""match_label"" class=""label expander"">
<span class=""fa""></span>Match information
</div>
<div class=""overflow_handler box_overflow_fix flex-grow"">
<div id=""match_info"">
Detailed match information will be displayed here automatically.
</div>
</div>
</div>
<div id=""quickref"" class=""box_overflow_fix flex-elem"">
<div class=""label expander"">
<span class=""fa""></span>Quick reference
</div>
<div id=""quickref_data"" class=""flex-grow"">
<div id=""first_menu"" class=""box_overflow_fix general_menu"">
<ul>
<li class=""menu_notice"">
<div class=""filter_input filter_mini box_overflow_fix"" id=""quickref_filter_parent"">
<i class=""fa fa-search""></i>
<div class=""filter_div"">
<input data-focus=""#quickref_filter_parent"" type=""text"" id=""quickref_filter"" class=""filter_parent box_overflow_fix"" name=""quickref_filter"" value="" placeholder=""filter"">
</div>
</div>
<span class=""text_overflow"" style=""margin-right: 5px;"">Full reference</span>
</li>
<li class=""menu_item"" data-id=""basic""><i class=""fa fa-star""></i>Most used tokens</li>
<li class=""menu_item"" data-id=""fullref""><i class=""fa fa-database""></i>All tokens</li>
<li class=""menu_notice"">Categories</li>
<li class=""menu_item"" data-id=""other""><i class=""fa fa-dot-circle-o""></i>General tokens</li>
<li class=""menu_item"" data-id=""anchors""><i class=""fa fa-anchor""></i>Anchors</li>
<li class=""menu_item"" data-id=""meta""><i class=""fa fa-bolt""></i>Meta sequences</li>
<li class=""menu_item"" data-id=""quantifiers""><i class=""fa fa-asterisk""></i>Quantifiers</li>
<li class=""menu_item"" data-id=""groups""><i class=""fa fa-dot-circle-o""></i>Group constructs</li>
<li class=""menu_item"" data-id=""charclass""><i class=""fa fa-th-large""></i>Character classes</li>
<li class=""menu_item"" data-id=""modifiers""><i class=""fa fa-flag""></i>Flags/Modifiers</li>
<li class=""menu_item"" data-id=""subst""><i class=""fa fa-scissors""></i>Substitution</li>
<li class=""menu_item"" id=""quickref_search""><i class=""fa fa-search""></i>Search result</li>
</ul>
</div>
<div id=""second_menu"" class=""no_icon box_overflow_fix general_menu overflow_handler"">
<ul class=""no_icon""></ul>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<div class=""delimiter-dropdown dropdown dropdown-relative dropdown-tip dropdown-index"">
<ul class=""dropdown-menu"">
<li><a href=""#"">/</a></li>
<li><a href=""#"">~</a></li>
<li><a href=""#"">@</a></li>
<li><a href=""#"">;</a></li>
<li><a href=""#"">%</a></li>
<li><a href=""#"">`</a></li>
</ul>
</div>
<div id=""dimmer""></div>
<div id=""dimmer-popup""></div>
<div id=""match-tooltip"" class=""arrow-box monospace"">
<div id=""tooltip-contents""></div>
<div id=""match-tooltip-tip"" class=""arrow-box-tip""></div>
</div>
<script src=""/js/underscore-min.1433274318.js"" type=""text/javascript""></script>
<script src=""//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"" type=""text/javascript""></script>
<script src=""/js/jquery.tools.1433274318.js"" type=""text/javascript""></script>
<script src=""/js/general.regex101.1433274319.js"" type=""text/javascript""></script>
<script src=""/js/colorParser.regex101.1433274323.js"" type=""text/javascript""></script>
<script src=""/js/explainer.regex101.1433274320.js"" type=""text/javascript""></script>
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<script src=""/js/common.regex101.1433274322.js"" type=""text/javascript""></script>
<script src=""/js/matcher.regex101.1433274321.js"" type=""text/javascript""></script>
</body>
</html>";
foreach (Match m in Regex.Matches(input, pattern))
{
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