using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^([^;,\n]*)(;.*(\1)(,.*|;)?|;;)$";
string input = @"/foo;/foo,/bar,/test;
/foo;/bar,/foo,/test;
/foo;/bar,/test,/foo;
/foo;/bar,/baz,/test;
/foo;;/foo,/bar,/test
/foo;;/bar,/foo,/test
/foo;;/bar,/test,/foo
/foo;;/bar,/baz,/test
/foo;;";
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