private static void Main(string[] args) { Console.WriteLine("Enter a collection of numbers in the range [0,100], seprated by spaces: "); var userInput = Console.ReadLine(); var tempArray = userInput.Split(' '); string[] inputArray = new HashSet <string>(tempArray).ToArray(); // removing duplicates BST firstTree = new BST(); for (int i = 0; i < inputArray.Length; i++) { firstTree.Insert(int.Parse(inputArray[i])); } firstTree.TreeStatistcis(); }