using System;

class Talker
{
    public static int BlahBlahBlah (string thingToSay, int numberOfTimes)
    {
        string finalString = "";
        for (int count = 1; count <= numberOfTimes; count++)
        {
            finalString = finalString + thingToSay + "\n";
        }
        MessageBox.Show(finalString);
        return finalString.Length;
    }
}

namespace WindowsFormsApp2
    
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            int len = Talker.Blahblahblah(textBox1.Text, (int)numericUpDown1.Value);
            MessageBox.Show("Длина строки "+ len);
        }
    }
}