using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"([0-9]|[0-1][0-2])\:?([0-5][0-9])? ([A|P]M) to ([0-9]|[0-1][0-2])\:?([0-5][0-9])? ([A|P]M)";
string input = @"9:59 AM to 5:59 PM
9 AM to 5 PM
9:00 PM to 5:00 AM
12 PM to 12 AM";
RegexOptions options = RegexOptions.Multiline;
foreach (Match m in Regex.Matches(input, pattern, options))
{
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