Data commit

Task/Constrained-random-points-on-a-circle/C-sharp/constrained-random-points-on-a-circle.cs

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+using System;
+using System.Diagnostics;
+using System.Drawing;
+
+namespace RosettaConstrainedRandomCircle
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            var points = new Point[404];
+            int i = 0;
+            for (int y = -15; y <= 15; y++)
+                for (int x = -15; x <= 15 && i < 404; x++)
+                {
+                    var c = Math.Sqrt(x * x + y * y);
+                    if (10 <= c && c <= 15)
+                    {
+                        points[i++] = new Point(x, y);
+                    }
+                }
+
+            var bm = new Bitmap(600, 600);
+            var g = Graphics.FromImage(bm);
+            var brush = new SolidBrush(Color.Magenta);
+
+            var r = new System.Random();
+            for (int count = 0; count < 100; count++)
+            {
+                var p = points[r.Next(404)];
+                g.FillEllipse(brush, new Rectangle(290 + 19 * p.X, 290 + 19 * p.Y, 10, 10));
+            }
+            const string filename = "Constrained Random Circle.png";
+            bm.Save(filename);
+            Process.Start(filename);
+        }
+    }
+}