public void DeleteNode(T data)
{
var deleteNode = HeapTree.Where(o => o.CompareTo(data) == 0).FirstOrDefault();
if (deleteNode == null)
{
throw new ArgumentException("delete data doesn't exist in heap");
}
var lastNode = HeapTree[LastIndex];
var deleteNodeIndex = Array.IndexOf(HeapTree, deleteNode);
HeapTree[deleteNodeIndex] = lastNode;
ReHeapifyFromIndex(deleteNodeIndex);
LastIndex--;
}
