C# Random based on RandomNumberGenerator | source: https://www.eimagine.com/how-to-generate-better-random-numbers-in-c-net-2/

Rando.cs

using System;
using System.Security.Cryptography;

namespace R
{
    ///<summary>
    /// Represents a pseudo-random number generator, a device that produces random data.
    ///</summary>
    public class Rando : RandomNumberGenerator
    {
        private static RandomNumberGenerator Rng = RandomNumberGenerator.Create();

        ///<summary>
        /// Fills the elements of a specified array of bytes with random numbers.
        ///</summary>
        ///<param name="data">An array of bytes to contain random numbers.</param>
        public override void GetBytes(byte[] data)
        {
            Rng.GetBytes(data);
        }

        ///<summary>
        /// Returns a random number between 0.0 and 1.0.
        ///</summary>
        public double NextDouble()
        {
            byte[] b = new byte[4];
            Rng.GetBytes(b);
            return BitConverter.ToUInt32(b, 0) / ((double)UInt32.MaxValue + 1);
        }

        ///<summary>
        /// Returns a random number within the specified range.
        ///</summary>
        ///<param name="minValue">The inclusive lower bound of the random number returned.</param>
        ///<param name="maxValue">The exclusive upper bound of the random number returned. maxValue must be greater than or equal to minValue.</param>
        public int Next(int minValue, int maxValue)
        {
            long range = (long)maxValue - minValue;

            return (int)((long)Math.Floor(NextDouble() * range) + minValue);
        }

        ///<summary>
        /// Returns a nonnegative random number.
        ///</summary>
        public int Next()
        {
            return Next(0, Int32.MaxValue);
        }

        ///<summary>
        /// Returns a nonnegative random number less than the specified maximum
        ///</summary>
        ///<param name="maxValue">The inclusive upper bound of the random number returned. maxValue must be greater than or equal 0</param>
        public int Next(int maxValue)
        {
            return Next(0, maxValue);
        }
    }
}

Thanks for sharing. How do you dispose Rng (RandomNumberGenerator implements IDisposable)?

@simen-wu, you could probably do something like this: https://stackoverflow.com/a/12126624/234132

I don't understand the point of this class. You inherit from RandomNumberGenerator, but you also instantiate a static RandomNumberGenerator. Why? Why not just call base.GetBytes(byte[] data)?

It would make more sense to me if you made all of your methods static, which you could since they only use Rng.

No disrespect meant, by the way. I spend a good amount of time in glass houses myself. 😃