Added a SortedList

DataStructures/SortedList.cs

@@ -0,0 +1,135 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics.Contracts;
+
+namespace DataStructures.ListSpace
+{
+    /// <summary>
+    /// Use insertion sort for every element added
+    /// </summary>
+    /// <typeparam name="T"></typeparam>
+    [Serializable]
+    public class SortedList<T> : IEnumerable<T>, ICollection<T>
+        where T : IComparable<T>
+    {
+        private List<T> list;
+
+        public int Capacity
+        {
+            get { return list.Capacity; }
+        }
+
+        bool ICollection<T>.Remove(T item)
+        {
+            var success = ((ICollection<T>)list).Remove(item);
+            return success;
+        }
+
+        public int Count
+        {
+            get { return list.Count; }
+        }
+
+        public bool IsReadOnly { get; private set; }
+        public bool IsSynchronized { get { return false; } }
+
+        [ContractInvariantMethod]
+        private void ObjectInvariant()
+        {
+            Contract.Invariant(Count >= 0);
+            Contract.Invariant(Capacity >= 0);
+        }
+
+        public SortedList() 
+        {
+            list = new List<T>();
+        }
+
+        public SortedList(int capacity)
+        {
+            Contract.Requires<ArgumentOutOfRangeException>(capacity > 0);
+
+            list = new List<T>(capacity);
+        }
+
+        public SortedList(IEnumerable<T> list)
+        {
+            Contract.Requires<ArgumentNullException>(list != null);
+
+            this.list = new List<T>(list);
+            this.list.Sort();
+        }
+
+        public void Add(T element)
+        {
+            Contract.Requires<ArgumentNullException>(element != null);
+
+            var count = 0;
+            //search for the previous element only when there are other elements in the list
+            if(list.Count>0){
+                for (var i = 0; i < list.Count; i++, count++)
+                {
+                    if (element.CompareTo(list[i]) <= 0)
+                    {
+                        count = i;
+                        break;
+                    }
+                }
+                if(count>0)
+                    Contract.Assert(list[count-1].CompareTo(element) <= 0);
+            }
+            list.Insert(count, element);
+        }
+
+        public void Clear()
+        {
+            list = new List<T>();
+        }
+
+        public bool Contains(T item)
+        {
+            return list.Contains(item);
+        }
+
+        public void CopyTo(T[] array, int arrayIndex)
+        {
+            Contract.Requires<ArgumentNullException>(array != null, "array is null");
+            Contract.Requires<ArgumentOutOfRangeException>(arrayIndex >= 0, "arrayIndex less than 0");
+
+            for (var i = arrayIndex; i < list.Count; i++)
+            {
+                array[i] = list[i];
+            }
+        }
+
+        public void Remove(T element)
+        {
+            Contract.Requires<ArgumentNullException>(element != null);
+
+            list.Remove(element);
+        }
+
+        public void CopyTo(Array array, int index)
+        {
+            Contract.Requires<ArgumentNullException>(array != null, "array is null");
+            Contract.Requires<ArgumentOutOfRangeException>(index >= 0, "arrayIndex less than 0");
+            Contract.Requires<ArgumentException>(array.Length < Count, "array not big enough");
+
+            int i = index;
+            foreach (T element in list)
+            {
+                array.SetValue(element, i++);
+            }
+        }
+
+        public IEnumerator<T> GetEnumerator()
+        {
+            return list.GetEnumerator();
+        }
+
+        System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
+        {
+            return this.GetEnumerator();
+        }
+    }
+}