How to validate a URL using regular expression in C#?

To validate, you need to check for the protocols.

http
https

With that, you need to check for .com, .in, .org, etc.

For this, use the following regular expression −

(http|http(s)?://)?([\w-]+\.)+[\w-]+[.com|.in|.org]+(\[\?%&=]*)?

The following is the code −

Example

 Live Demo

using System;
using System.Text.RegularExpressions;
namespace RegExApplication {
   class Program {
      private static void showMatch(string text, string expr) {
         Console.WriteLine("The Expression: " + expr);
         MatchCollection mc = Regex.Matches(text, expr);
         foreach (Match m in mc) {
            Console.WriteLine(m);
         }
      }
      static void Main(string[] args) {
         string str = "https://example.com";
         Console.WriteLine("Matching URL...");
         showMatch(str, @"^(http|http(s)?://)?([\w-]+\.)+[\w-]+[.com|.in|.org]+(\[\?%&=]*)?");
         Console.ReadKey();
      }
   }
}

Output

Matching URL...
The Expression: ^(http|http(s)?://)?([\w-]+\.)+[\w-]+[.com|.in|.org]+(\[\?%&=]*)?
https://example.com