Merge pull request #3671 from NotADucc/0225

create 0225-implement-stack-using-queues.cs

Author: Ykhan799

csharp/0225-implement-stack-using-queues.cs

@@ -0,0 +1,33 @@
+public class MyStack
+{
+    Queue<int> queue;
+
+    public MyStack()
+    {
+        queue = new Queue<int>();
+    }
+
+    public void Push(int x)
+    {
+        queue.Enqueue(x);
+        for (int i = 0; i < queue.Count - 1; i++)
+        {
+            queue.Enqueue(queue.Dequeue());
+        }
+    }
+
+    public int Pop()
+    {
+        return queue.Dequeue();
+    }
+
+    public int Top()
+    {
+        return queue.Peek();
+    }
+
+    public bool Empty()
+    {
+        return queue.Count == 0;
+    }
+}