Split string and string arrays

Question

string s= abc**xy**efg**xy**ijk123**xy**lmxno**xy**opq**xy**rstz;

I want the output as string array, where it get splits at "xy". I used

  string[] lines = Regex.Split(s, "xy"); 

here it removes xy. I want array along with xy. So, after I split my string to string array, array should be as below.

lines[0]= abc;
lines[1]= xyefg;
lines[2]= xyijk123;
lines[3]= xylmxno;
lines[4]= xyopq ;
lines[5]= xyrstz;

how can i do this?

Answer 1

(?=xy)

You need to split on 0 width assertion.See demo.

https://regex101.com/r/fM9lY3/50

string strRegex = @"(?=xy)";
Regex myRegex = new Regex(strRegex, RegexOptions.None);
string strTargetString = @"abcxyefgxyijk123xylmxnoxyopqxyrstz";

return myRegex.Split(strTargetString);

Output:

abc xyefg xyijk123 xylmxno xyopq xyrstz