[Edit]

C# / .NET - generate random string of size n characters

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Created by:

Wade

562

In this article, we would like to show you how to generate random string of size n characters in C#.

Quick solution:

xxxxxxxxxx
 
string ALPHABET = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" +
    "abcdefghijklmnopqrstuvwxyz" +
    "0123456789";
​
int length = 10;
​
Random random = new Random();
​
var result = Enumerable.Repeat(ALPHABET, length)
.Select(s => s[random.Next(s.Length)]).ToArray();
​
Console.WriteLine(result); // Example output: gDoJlEYyZr

Practical example

Edit

The following example presents how to generate random string of size n=10 using characters taken from ALPHABET variable.

xxxxxxxxxx
 
using System;
using System.Linq;
​
public class TestClass
{
    public static void Main()
    {
        string ALPHABET = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" +
            "abcdefghijklmnopqrstuvwxyz" +
            "0123456789";
​
        int length = 10;
​
        Random random = new Random();
​
        var result = Enumerable.Repeat(ALPHABET, length)
        .Select(s => s[random.Next(s.Length)]).ToArray();
​
        Console.WriteLine(result);
    }
}