SqlConnection con = new SqlConnection(@"Data Source=NICKY-PC;Initial Catalog=CRUD;Integrated Security=True;");
            SqlDataAdapter sda = new SqlDataAdapter("Select count(*) From Login where Username='" + textBox1.Text + "' and Password ='" + textBox2.Text + "'",con);
            DataTable dt = new DataTable();
            sda.Fill(dt);
            if (dt.Rows[0][0].ToString() == "1")
            {