static void Main(string[] args)
{
var hashTable = new HashTable();
hashTable.AddValue("123");
Console.WriteLine("hashTable.AddValue(\"123\")");
Console.WriteLine($"hashTable.Contains(\"123\"): {hashTable.Contains("123")}");
Console.WriteLine();
hashTable.DeleteValue("123");
Console.WriteLine("hashTable.DeleteValue(\"123\")");
Console.WriteLine($"hashTable.Contains(\"123\"): {hashTable.Contains("123")}");
Console.WriteLine();
hashTable.AddValue("123");
Console.WriteLine("hashTable.AddValue(\"123\")");
hashTable.Clear();
Console.WriteLine("hashTable.Clear()");
Console.WriteLine($"hashTable.Contains(\"123\"): {hashTable.Contains("123")}");
}