try
            {
            string query = "http://maps.google.com/maps?q=";
            string street=textBox1.Text;
            string city=textBox2.Text;
            if (textBox1.Text != "")
            {
                street=street.Replace(" ","+");
                query += street+  "," + "+";
            }
            if(textBox2.Text!="")
            {
                city = city.Replace(" ", "+");
                query += city;
            }
            webBrowser1.Navigate(query.ToString());
            }
            catch (System.Exception ex)
            {
                MessageBox.Show(ex.Message, "Unable to Retrieve Map");
            }