C# cryptographic random string generator

RandomString.cs

// Requires: https://github.com/gsscoder/csharpx

using System;
using System.Linq;
using CSharpx;

static class RandomString
{
    const string _alphanumeric = "abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    const string _chars = "abcdefghijklmnopqrstuvwxyz0123456789!\"#$%&'()*@[\\]^_`{|}~ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    const string _charsNoQuotes = "abcdefghijklmnopqrstuvwxyz0123456789!#$%&()*@[\\]^_{|}~ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    static Random _random = new CryptoRandom();

    public static string Generate(int length, bool alphanumeric = true, bool noQuotes = false)
    {
        if (noQuotes && alphanumeric) throw new ArgumentException(
            nameof(noQuotes), "noQuotes cannot be true when alphanumeric is true.");
        var chars = alphanumeric ? _alphanumeric : (noQuotes ? _charsNoQuotes : _chars);
        return new string((from c in Enumerable.Repeat(chars, length)
                           select c[_random.Next(c.Length)]).ToArray());
    }
}