Replace parts of a string with C# Regex

Set a string −

string str = "Bit and Bat";

Let’s say you need to replace whatever comes inside B and t to A and capitalize the complete string. For that, use Replace −

Regex.Replace(str, "B.t", "BAT");

Let us see the complete code −

Example

 Live Demo

using System;
using System.Text.RegularExpressions;
namespace Demo {
   class Program {
      static void Main(string[] args) {
         string str = "Bit and Bat";
         Console.WriteLine(str);
         string res = Regex.Replace(str, "B.t", "BAT");
         Console.WriteLine(res);
      }
   }
}

Output

Bit and Bat
BAT and BAT