using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^(?=[^-]+-([^=]+)=.)([^-]*?)\1([^-]*)-[^=]+=\2\3$";
string input = @"abc-b=ac
abcde-cd=abe
ab-a=b
abcde-a=bcde
abcde-cde=ab
abc-a=c
abcde-bd=ace
abc-cd=ab
abcde-a=cde
abc-abc=
abc-=abc";
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