Convert Strings to Hexadecimal in C#

Hexadecimal, often referred to as hex, is a base-16 numbering system widely used in computing. In this article, we will walk you through a simple program that shows how to convert strings to their hexadecimal representation in C#.

using System;
using System.Text;

class Program
{
    static void Main()
    {
        // Input string
        string inputString = "Hello, Techies!";

        // Convert string to hexadecimal
        string hexResult = StringToHex(inputString);

        // Display results
        Console.WriteLine($"Input String: {inputString}");
        Console.WriteLine($"Hexadecimal Result: {hexResult}");
        Console.ReadKey();
    }

    static string StringToHex(string input)
    {
        // Convert string to byte array
        byte[] byteArray = Encoding.UTF8.GetBytes(input);

        // Convert byte array to hexadecimal string
        StringBuilder hexBuilder = new StringBuilder();
        foreach (byte b in byteArray)
        {
            hexBuilder.Append(b.ToString("X2")); // X2 ensures two-digit representation
        }

        return hexBuilder.ToString();
    }
}

Output:

Input String: Hello, Techies!
Hexadecimal Result: 48656C6C6F2C205465636869657321