using System;

​

private void btnCalc_Click()

        {

​

            string input = "2.2";

                if (input.Contains("."))

                {

                 input.Replace("." , ",");

                }

                double input1;

                double.TryParse(input, out input1);

​

            int input2 = int.Parse(tbxInp2.Text);

​

            double result1 = Math.Round(input1, input2);

            double result2 = Math.Round(input1, 3);

            string text1 = result1.ToString();

            string text2 = result2.ToString();

            lblResult1.Text = text1;

            lblResult2.Text = text2;

​

        }