using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;
public class Test
{
public static void Main()
{
var s = "Завтрак в 22:30;";
var regex = new Regex(@"\b(?:[01][0-9]|2[0-3]):[0-5][0-9]\b");
var matches = regex.Matches(s).Cast<Match>().Select(x => x.Value);
foreach (var match in matches)
{
Console.Write(match);
}
}
}
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