using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^(?:[a-z]|\d+)(?:\.\d+)*\.?\s*(?:\([A-Z]\.\d+(?:\.[A-Z]\.\d+)*\)\s*)?";
string substitution = @"";
string input = @"c.2 Employed population below international poverty line, by sex and age (%) Age: 15+
b.1 Employed population below international poverty line, by sex and age (%) Age: 15+
a.1 Employed population below international poverty line, by sex and age (%) Age: 15+
1. Employed population below international poverty line, by sex and age (%) Age: 15+
1.2 Employed population below international poverty line, by sex and age (%) Age: 15+
1.1.1 Employed population below international poverty line, by sex and age (%) Age: 15+
5.6.2 (S.1.C.1) Employed population below international poverty line, by sex and age (%) Age: 15+
5.6.2 (S.3) Employed population below international poverty line, by sex and age (%) Age: 15+
5.6.2 (S.4.C.13) Employed population below international poverty line, by sex and age (%) Age: 15+";
RegexOptions options = RegexOptions.Multiline;
Regex regex = new Regex(pattern, options);
string result = regex.Replace(input, substitution);
}
}
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