private bool IsVailed(string str)
        {
            ArryStack <char> arryStack = new ArryStack <char>();

            for (int i = 0; i < str.Length; i++)
            {
                if (str[i] == '{' || str[i] == '[' || str[i] == '(')
                {
                    arryStack.Push(str[i]);
                }
                else if (str[i] == '}' || str[i] == ']' || str[i] == ')')
                {
                    if (arryStack.IsEmpty() == true)
                    {
                        return(false);
                    }
                    else if (arryStack.Peek() == '{')
                    {
                        if (str[i] == '}')
                        {
                            arryStack.Pop();
                        }
                        else
                        {
                            return(false);
                        }
                    }
                    else if (arryStack.Peek() == '[')
                    {
                        if (str[i] == ']')
                        {
                            arryStack.Pop();
                        }
                        else
                        {
                            return(false);
                        }
                    }
                    else if (arryStack.Peek() == '(')
                    {
                        if (str[i] == ')')
                        {
                            arryStack.Pop();
                        }
                        else
                        {
                            return(false);
                        }
                    }
                }
            }

            return(arryStack.IsEmpty());
        }
        private void btn_ArrayStack_Click(object sender, EventArgs e)
        {
            ArryStack <int> arryStack = new ArryStack <int>();

            for (int i = 0; i < 5; i++)
            {
                arryStack.Push(i);
                Console.WriteLine(arryStack.ToString());
            }

            arryStack.Pop();
            Console.WriteLine(arryStack.ToString());
        }