Add two numbers using Window Application C#.

Step 1.

Create a New Window Application Form in Microsoft Visual Studio.

create window

Step 2.

Design your Window Application Form like below form.

add form

Step 3.

Now double click on Submit Button and write below coding.

   
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    using System.Windows.Forms;

    namespace WindowsFormsApplication1
    {
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        //submit button coding
        private void button1_Click(object sender, EventArgs e)
        {
            int a, b, c;
            a = Convert.ToInt32(textBox1.Text);
            b = Convert.ToInt32(textBox2.Text);
            c = a + b;
            textBox3.Text = c.ToString();
        }
        }
    }
    

Output

add output
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