using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"\(((?:[^()]|\(\))+)\)";
string input = @"x (a) y -> a
x (a b) y -> a b
x (a b c) y -> a b c
x (a b() c) y -> a b() c
x (a() b() c) y -> a() b() c
x (a b() c()) y -> a b() c()
x (a b(a) c) y -> a
x (a (b() c)) y -> b() c
x () y -> empty
";
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