diff --git a/BuySellStockII.cs b/BuySellStockII.cs
new file mode 100644
index 0000000..8103d59
--- /dev/null
+++ b/BuySellStockII.cs
@@ -0,0 +1,13 @@
+public class Solution {
+    public int MaxProfit(int[] prices) {
+        int profit = 0;
+        for(int i=1;i<prices.Length;i++)
+        {
+            if(prices[i] > prices[i-1])
+            {
+                profit += prices[i]-prices[i-1];
+            }
+        }
+        return profit;
+    }
+}
\ No newline at end of file
diff --git a/PeekingIterator.cs b/PeekingIterator.cs
new file mode 100644
index 0000000..57b6584
--- /dev/null
+++ b/PeekingIterator.cs
@@ -0,0 +1,33 @@
+using System.Collections.Generic;
+
+public class PeekingIterator
+{
+    private IEnumerator<int> _iterator;
+    private bool _hasNext;
+    private int _next;
+
+    public PeekingIterator(IEnumerator<int> iterator)
+    {
+        _iterator = iterator;
+        _hasNext = true;
+    }
+
+    public int Peek()
+    {
+        return _iterator.Current;;
+    }
+
+    public int Next()
+    {
+        int result = _iterator.Current;
+
+        _hasNext = _iterator.MoveNext();
+
+        return result;
+    }
+
+    public bool HasNext()
+    {
+        return _hasNext;
+    }
+}
\ No newline at end of file