using System;
using System.Text.RegularExpressions;
class Demo {
public static void Main()
{
var htmlCode = "href=\"/cgi-bin/pin.cgi?pin=94841&sid=9548.1386389012.v1\"><";
var sids = Regex.Match(htmlCode, @"sid=(.+?)""");
Console.WriteLine(sids.Groups[1].Value);
}
}
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