Help with this search and replace

this will hopefully move u closer a bit:

flavor .NET

match text where non-newline character (Group_1) is
immediately
followed by '011' (Group_2) using pattern:

(?<Group_1>[^n])(?<Group_2>011)

then replace it with inserted newline as

$1n$2

as a result, text :

011fadjf;adkjf;alk011dsjfadlkfjadsklfja;sdkljf011dasl;d;as

would become :

011fadjf;adkjf;alk
011dsjfadlkfjadsklfja;sdkljf
011dasl;d;as


code in c# .net:

using System;
using System.Text.RegularExpressions;

public class Clean_Phone_No
{
	public static void Main()
	{
		//declare an input string of text
		string InputString =
"011fadjf;adkjf;alk011dsjfadlkfjadsklfja;sdkljf0
11dasl;d;as";
		//declare RegEx object
		Regex r = new Regex(
			"([^n])(011)",
			RegexOptions.IgnoreCase
			| RegexOptions.Multiline
			| RegexOptions.Compiled			);
		//clean the input string by replacing with captured group
1
		string ResultString = r.Replace(InputString,
"$1n$2");

		//print the cleaned string
		Console.WriteLine("ResultString: " +
ResultString+ "nPress Enter to
Exit");
		Console.ReadLine(); 

	}
}