using System;
using System.Text.RegularExpressions;
public class Test
{
public static void Main()
{
var str = "StopService::\r\n697::12::test::20::a@yahoo.com::20 Main Rd::Alcatraz::CA::1200::Please send me Information to\r\nA@gmail.com::0::::";
var rgx = new Regex(@"(?<=^[^:]*::)[\r\n]+");
Console.WriteLine(rgx.Replace(str, string.Empty));
}
}
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