Add project files.

WindowsFormsCore/Operations/CryptoRandom.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Security.Cryptography;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace WindowsFormsCore.Operations
+{
+    public class CryptoRandom : Random
+    {
+        private RNGCryptoServiceProvider _rng = new RNGCryptoServiceProvider();
+        private byte[] _uint32Buffer = new byte[4];
+
+        public CryptoRandom() { }
+        public CryptoRandom(Int32 ignoredSeed) { }
+
+        public override Int32 Next()
+        {
+            _rng.GetBytes(_uint32Buffer);
+            return BitConverter.ToInt32(_uint32Buffer, 0) & 0x7FFFFFFF;
+        }
+
+        public override Int32 Next(Int32 maxValue)
+        {
+            if (maxValue < 0) throw new ArgumentOutOfRangeException("maxValue");
+            return Next(0, maxValue);
+        }
+
+        public override Int32 Next(Int32 minValue, Int32 maxValue)
+        {
+            if (minValue > maxValue) throw new ArgumentOutOfRangeException("minValue");
+            if (minValue == maxValue) return minValue;
+            Int64 diff = maxValue - minValue;
+
+            while (true)
+            {
+                _rng.GetBytes(_uint32Buffer);
+                UInt32 rand = BitConverter.ToUInt32(_uint32Buffer, 0);
+
+                Int64 max = (1 + (Int64)UInt32.MaxValue);
+                Int64 remainder = max % diff;
+                if (rand < max - remainder)
+                {
+                    return (Int32)(minValue + (rand % diff));
+                }
+            }
+        }
+
+        public override double NextDouble()
+        {
+            _rng.GetBytes(_uint32Buffer);
+            UInt32 rand = BitConverter.ToUInt32(_uint32Buffer, 0);
+            return rand / (1.0 + UInt32.MaxValue);
+        }
+
+        public override void NextBytes(byte[] buffer)
+        {
+            if (buffer == null) throw new ArgumentNullException("buffer");
+            _rng.GetBytes(buffer);
+        }
+    }
+}