求个NET语法的正则取指定字符串

[ljsheng]

</div></div></div></li></ul></div> <!----></div>[/b <div class="liveroom-sidebar light" data-v-2fe8a5db data-v-32b72c21><!----> <!----> <!----> <div class="chat empty" data-v-2fe8a5db><div class="gift" data-v-55ff822b data-v-2fe8a5db></div> <h3 data-v-2fe8a5db>聊天室</h3> <div class="chat-container chat-history-container" data-v-67866bb7 data-v-2fe8a5db><!----> <!----></div>



<div live-stream-id="ea3f_dCLJMY" class="combo-comments-container combo-comments light" style="display:none;" data-v-bd91a484 data-v-2fe8a5db>

[b]live-stream-id="ea3f_dCLJMY" 偶想要这的 ea3f_dCLJMY 正则咋写NET的

string reg = "(?is), live-stream-id(?<value>.*?),";
            Match lid = Regex.Match(source, reg);
            WEBTB.Text = source;
            IDTB.Text = lid.Groups["value"].Value;

<div class="combo-comments" data-v-bd91a484></div></div> <div class="chat-actions" data-v-2fe8a5db><!----> <div class="chat-input" data-v-2fe8a5db><div class="input-container light" data-v-7e0b9386 data-v-2fe8a5db><textarea disabled="disabled" max-length="40" placeholder="来一起互动吧" class="pl-textarea textarea" data-v-7e0b9386></textarea> <button type="button" disabled="disabled" class="submit-button valid" data-v-7e0b9386><span data-v-7e0b9386>发送<!----></span></button></div></div></div></div></div></div> <div class="pl-modal alert" style="display:none;" data-v-9ec354e4><div class="pl-modal-dialog" style="width:370px;"><h4 class="pl-modal-title">提示</h4> <div class="pl-modal-body"> <div class="pl-modal-alert"></div> <div class="pl-modal-alert-action"><button type="button" class="pl-btn pl-btn-primary pl-btn-medium">确定</button></div></div></div></div> <div class="pl-modal confirm" style="display:none;" data-v-9ec354e4><div class="pl-modal-dialog" style="width:370px;"><h4 class="pl-modal-title">提示</h4> <div class="pl-modal-body"> <div class="pl-modal-confirm"></div> <div class="pl-modal-confirm-action"><button type="button" class="pl-btn pl-btn-default pl-btn-medium">取消</button> <button type="button" class="pl-btn pl-btn-primary pl-btn-medium">确定</button></div></div></div></div> <!----> <!----> <!----> <!----> <div class="loading end invisible" data-v-54ca8754 data-v-9ec354e4></div> <!----> <!----> <!----> <div class="shadow-area" data-v-9ec354e4><a rel="nofollow" href="/i/page/traffic/index.html" data-v-9ec354e4>快手直播电竞官方号</a></div></div>

[大葡萄八块一斤]

Regex.Match(source, "(?is)(?<=live-stream-id=\").*?(?=\")").Value;

[ljsheng]

偶自己的错....