BBOP.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace BBOP
{
    public class BBOP
    {

        private static string[] _BBOPArray = new string[] { "ビ", "ビ", "ド", "レ", "ド", "オ", "ペ", "レ", "ショ" };

        public string GetBBOP()
        {
            var rand = new Random();
            var shuffle = Enumerable.Range(0, 9).Select(x => _BBOPArray.ElementAt(rand.Next(9)));
            return string.Format("{0}{1}ッ{2}{3}ッ{4}・{5}{6}{7}ー{8}ン", shuffle.ToArray());
        }
    }
}