C# — Generate a Random String in One Line

 

C# — Generate a Random String in One Line

Most people use loops to build random strings, but here’s a fun way with LINQ:

using System;

using System.Linq;

class Program

{

    static void Main()

    {

        // Generate a random 12-character string (letters + digits) in one line

        string randomCode = new string(

            Enumerable.Range(0, 12)

                      .Select(_ => "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"[new Random().Next(36)])

                      .ToArray()

        );

        Console.WriteLine($"Your unique code: {randomCode}");

    }

}

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✅ What’s cool about it?

• Uses LINQ and Enumerable.Range instead of loops.

• Builds the string in a functional style.

• The source alphabet can be changed to include symbols, lowercase, etc.

🧩 Curiosity twist: You can even generate a “random word” from emojis instead of letters:

string emojiWord = new string(
    Enumerable.Range(0, 5)
              .Select(_ => "🍕🍔🍟🍣🍩🍪🍫🍿🥑"[new Random().Next(9)])
              .ToArray()
);

Console.WriteLine($"Emoji word: {emojiWord}");