Min Heap (Implementation)

using System;
namespace chapter_8
{
    class Program
    {
        static void Main(string[] args)
        {
            MinHeap<int> heap = new MinHeap<int>();
            int size = 6;
            int[] arr = { 2, 8, 15, 5, 1, 20 };
            heap.buildHeap(arr, size);
            heap.printHeap();
            Console.WriteLine(heap.getMin());
            heap.removeMin();
            Console.WriteLine(heap.getMin());
            heap.removeMin();
            heap.insert(-10);
            Console.WriteLine(heap.getMin());
            return;
        }
    }
}