In this blog, we will know how to subtract two numbers without using - operator.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace Subtract_two_numbers_without_minus
{
 public partial class Form1 : Form
 {
 public Form1()
 {
 InitializeComponent();
 }
 private void btn_Subtract_Click(object sender, EventArgs e)
 {
 int value1, value2, difference;
 if (!int.TryParse(textBox1.Text, out value1))
 {
 MessageBox.Show("Not a valid integer. Please re-enter.");
 textBox1.Focus();
 return;
 }
 if (!int.TryParse(textBox2.Text, out value2))
 {
 MessageBox.Show("Not a valid integer. Please re-enter.");
 textBox2.Focus();
 return;
 }
 difference = value1 + ~value2 + 1;
 MessageBox.Show(difference.ToString());
 clear();
 }
 void clear()
 {
 textBox1.Text = "";
 textBox2.Text = "";
 }
 }