Moved nesting to SawCut library

SawCut/Bin.cs

@@ -0,0 +1,48 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace SawCut
+{
+    public class Bin
+    {
+        public List<BinItem> Items;
+
+        public Bin(double length)
+        {
+            Items = new List<BinItem>();
+            Length = length;
+        }
+
+        public double Spacing { get; set; }
+
+        public double Length { get; set; }
+
+        public double UsedLength
+        {
+            get
+            {
+                return Math.Round(Items.Sum(i => i.Length) + Spacing * Items.Count, 8);
+            }
+        }
+
+        public double RemainingLength
+        {
+            get { return Math.Round(Length - UsedLength, 8); }
+        }
+
+        public double Utilization
+        {
+            get { return UsedLength / Length; }
+        }
+
+        public override string ToString()
+        {
+            var totalLength = Math.Round(Length, 4);
+            var remainingLength = Math.Round(RemainingLength, 4);
+            var utilitation = Math.Round(Utilization * 100, 2);
+
+            return $"Length: {totalLength}\", {remainingLength}\" remaining, {Items.Count} items, {utilitation}% utilization";
+        }
+    }
+}