Added new Game logic library to assist with game projects

OmegaLeo.HelperLib.Game/Models/RNG.cs

@@ -0,0 +1,35 @@
+using System;
+
+namespace OmegaLeo.HelperLib.Game.Models
+{
+    public class RandomNumberGenerator
+    {
+        private readonly Random _random;
+
+        public int Seed { get; }
+
+        public RandomNumberGenerator(int? seed = null)
+        {
+            Seed = seed ?? Environment.TickCount;
+            _random = new Random(Seed);
+        }
+
+        public float NextFloat() =>
+            (float)_random.NextDouble();
+
+        public float Range(float min, float max) =>
+            min + NextFloat() * (max - min);
+
+        public int Range(int min, int max) =>
+            _random.Next(min, max);
+
+        public bool Chance(float probability) =>
+            NextFloat() <= probability;
+
+        public bool Percent(float percent) =>
+            Chance(percent / 100f);
+
+        public bool OneIn(int x) =>
+            Range(0, x) == 0;
+    }
+}