using System;

using SimpleBase;

using System.Security.Cryptography;

using System.Text.RegularExpressions;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine(Generate());

        Console.WriteLine(Generate(100));

    }

    private static string Generate(int length = 50)

    {

        using RNGCryptoServiceProvider cryptRNG = new RNGCryptoServiceProvider();

        byte[] buffer = new byte[length];

        cryptRNG.GetBytes(buffer);

        // Base85 will use more non-alphanumeric characters than a Base64 representation

        var secret = Base85.Ascii85.Encode(buffer);

        // Replace characters which will cause problems for common usage scenarios (JSON, XML, HTTP headers values, specifically not urls as password should not be used there)

        // This introduces a bias for the @ char, but is still better than Base64

        var safeSecret = Regex.Replace(secret, "[\\\\&'\"<>`]", "@" );

        return safeSecret.Substring(0, length);

    }

}