private void button1_Click_1 object sender EventArgs int Convert ToInt

        private void button1_Click_1(object sender, EventArgs e)
        {
            int N = Convert.ToInt32(numericUpDown1.Value);
            int[,] a = new int[N, N];
            int sum = 0, s = 0;
            bool mgc = true;
            Random rand = new Random();

            for (int i = 0; i < N; i++)
            {
                for (int j = 0; j < N; j++)
                    a[i, j] = rand.Next(0, 9);  
            }

            for (int i = 0; i < N; i++)
                sum += a[0, i];

            for (int i = 0; i < N; i++)
            {
                s = 0;
                for (int j = 0; j < N; j++)
                    s += a[i, j];
                if (s != sum)
                {
                    mgc = false;
                    break;
                }
            }

            if (mgc)
            {
                s = 0;
                for (int i = 0; i < N; i++)
                    for (int j = 0; j < N; j++)
                        if (i == j)
                            s += a[i, j];
                if (s != sum)
                    mgc = false;
            }


            if (mgc)
            {
                s = 0;
                for (int i = 0; i < N; i++)
                    for (int j = 0; j < N; j++)
                        if ((i + j) == (N - 1))
                            s += a[i, j];
                if (s != sum)
                    mgc = false;
            }

            string text = "";
            for (int i = 0; i < N; i++)
            {
                for (int j = 0; j < N; j++)
                    text += a[i, j] + " ";
                text += "\r\n";
            }

            textBox2.Text = text;

            if (mgc == true)
                textBox1.Text = "Congrats, Its magic square";
            else
                textBox1.Text = "Its not magic square";
        }