using System;
using System.Linq;
using System.Text.RegularExpressions;
using System.IO;
public class Test
{
public static void Main()
{
var s = "The server IP is -> 127.1.2.35:9001!";
var result = Regex.Match(s, @"[0-9]+:[0-9]+");
if (result.Success)
Console.WriteLine(result.Value);
}
}
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