Update all new Tasks

Task/Munching-squares/C-sharp/munching-squares.cs

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+using System.Drawing;
+using System.Drawing.Imaging;
+using System.Linq;
+
+class XORPattern
+{
+    static void Main()
+    {
+        var size = 0x100;
+        var black = Color.Black.ToArgb();
+        var palette = Enumerable.Range(black, size).Select(Color.FromArgb).ToArray();
+        using (var image = new Bitmap(size, size))
+        {
+            for (var x = 0; x < size; x++)
+            {
+                for (var y = 0; y < size; y++)
+                {
+                    image.SetPixel(x, y, palette[x ^ y]);
+                }
+            }
+            image.Save("XORPatternCSharp.png", ImageFormat.Png);
+        }
+    }
+}