Calculator in Asp.net C# easy method

Add  Button Coding

        int a, b, c;

        a = Convert.ToInt32(tb_1.Text);

        b = Convert.ToInt32(tb_2.Text);

        

        c = a + b;

      //Result is showing in label text You can  use Text box instead of label

            Lbl_result.Text = "Sum of two numbers is = " + c.ToString();

Subtraction  Button Coding

int a, b, c;

        a = Convert.ToInt32(tb_1.Text);

        b = Convert.ToInt32(tb_2.Text);

        

        c = a - b;

      

            Lbl_result.Text = "Subtraction of two numbers is = " + c.ToString();

Multiplication  Button Coding

int a, b, c;

        a = Convert.ToInt32(tb_1.Text);

        b = Convert.ToInt32(tb_2.Text);

        

        c = a * b;

      

            Lbl_result.Text = "Multiplication of two numbers is = " + c.ToString();

Devide  Button Coding

int a, b, c;

        a = Convert.ToInt32(tb_1.Text);

        b = Convert.ToInt32(tb_2.Text);

        

        c = a / b;

      

            Lbl_result.Text = "Devision of two numbers is = " + c.ToString();