using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(?:(\w+) *\(?)?\b(\d+) ?x ?(\d+) ?(cm)\b";
string input = @"
30 x 30 cm
30x30cm
30x30 cm
Ixxx 30x30cm
xxxx (30x30cm)
xxxx (30 x 30 cm)";
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