Generate a short, unique ID in C#. It uses a cryptographically strong random number generator and Base64Url encoding to create a short, URL-safe string. You can adjust the length as needed.
using System;
using System.Security.Cryptography;
public static class ShortIdGenerator
{
public static string Generate(int length = 12)
{
var byteLength = (int)Math.Ceiling(length * 0.75); // Base64 expands by 4/3
var bytes = new byte[byteLength];
RandomNumberGenerator.Fill(bytes);
var base64 = Convert.ToBase64String(bytes)
.Replace("+", "-")
.Replace("/", "_")
.Replace("=", "");
return base64.Substring(0, length);
}
}