using System;
using System.Text.RegularExpressions;

public class Test
{
	public static void Main()
	{
		var regexFormat = @"{0}(?=\()((?>/\*.*?\*/)|(?>@""(""""|[^""])*"")|(?>""(\\""|[^""])*"")|\r?\n|[^()""]|(?<open>\()|(?<-open>\)))+?(?(open)(?!))";

            var input = "var res = \"abc\" + Foo.myFunc(foo, \nBar.otherFunc( Baz.funk()));\nSomeOtherCode Foo.myFunc(.\r\n..)";
            Console.WriteLine(Regex.Replace(input, string.Format(regexFormat, @"Foo\.myFunc"), @"""def"""));

            var inputTrollMe = @"var res = ""abc"" + trollMe(""\""("", ""(("", @""abc""""de((f"")";
            Console.WriteLine(Regex.Replace(inputTrollMe, string.Format(regexFormat, @"trollMe"), @"""def"""));
            
            var inputTrollMeAgain = @"var res = ""abc"" + Foo.myFunc(0 /* "") */)";
            Console.WriteLine(Regex.Replace(inputTrollMeAgain, string.Format(regexFormat, @"Foo.myFunc"), @"""def"""));
	}
}