using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(?<address>\d{1,3}(?:\.\d{1,3}){2}\.(?<FromSeg>\d{1,3}))(?:(?:\/|\s+\/\s+)(?<CIDR>\d{1,2})|(?:-|\s+to\s+)(?<ToSeg>\d{1,3}(?![\d\.]))|(?:-|\s*to\s+)(?<ToIP>\d{1,3}(?:\.\d{1,3}){3})|\s+(?<Mask>25\d(?:\.\d{1,3}){3})|\s*)?";
string input = @"56.1.2.3/24
56.1.2.4-7
56.1.2.4-255.0.0.0
56.1.2.4 to 7
56.1.2.4 to 56.1.2.7
56.1.2.3 / 24
56.1.2.3
";
foreach (Match m in Regex.Matches(input, pattern))
{
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