using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"@(.*)(@[\s\S]*)@default\.\1.*";
string substitution = @"@$1$2";
string input = @"@d.e.f@=y
@a.b.c@=x
@h.i.j@=aaaa
@default.a.b.c@=QQQ
@asdfasd.fasdfs.asdfa@=23423
@default.h.i.j@=234
@default.RR.TT@=393993
@x.y.z@=0
@default.q.r.s@=1
@l.m.n@=8.3
@q.r.s@=78
@blah.blah.blah@=blah";
Regex regex = new Regex(pattern);
string result = regex.Replace(input, substitution, 1);
}
}
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