using System;
using System.Text.RegularExpressions;
namespace ConsoleApplication_C_Sharp
{
class Program
{
static void Main(string[] args)
{
string s1 = "C# .Net VB .Net";
string s2 = Regex.Replace(s1, "N.t", "DOT");
Console.WriteLine(s2);
}
}
}
/*
run:
C# .DOT VB .DOT
*/