Regex to remove an appended URL from an actual URL

I'm looking for a regular expression pattern that can remove a URL that is appended to the end of an actual URL.

For example, given the string https://test1-sc10-auth.comhttps://test1-sc10.com/search-results#e=0&q=news, I want to remove the appended URL https://test1-sc10.com so that the result is https://test1-sc10-auth.com/search-results#e=0&q=news.

I have tried using various regex patterns, but the closest result I got was https://test1-sc10.com/search-results#e=0&q=news using the pattern ^(.*?)((?:https?://\S+))(?:.*?\2)+?(.*)$.

Any suggestion would be appreciated.

Thanks in advance.

You should find what is happening, and also regex is an overkill to do this as we explain in the comments, try with this code:

Fiddle: https://dotnetfiddle.net/l7szjf

	string badurl = "https://test1-sc10-auth.comhttps://test1-sc10.com/search-results#e=0&q=news"; //your original url
	int position = badurl.IndexOf("http",6); //get the position of any http or https after the first one, assuming you only have only 2 times repeated the code.
	string goodurl = badurl.Substring(position); //get everything after that position
	Console.WriteLine(goodurl); //test it

You can solve it in one line:

url = url.Substring(url.IndexOf("http",6));