Wpf C# login system with hashing

private void btn_login_Click(object sender, RoutedEventArgs e)
{
    MySqlConnection sqlCon = new MySqlConnection("xxxxxx");
    try
    {
        if (sqlCon.State == System.Data.ConnectionState.Closed)
            sqlCon.Open();
        String query = "SELECT COUNT(1) FROM tblUser WHERE Username=@Username AND 
        Password=@Password";
        MySqlCommand sqlCmd = new MySqlCommand(query, sqlCon);
        sqlCmd.CommandType = System.Data.CommandType.Text;
        sqlCmd.Parameters.AddWithValue("@Username", txtUsername.Text);
        sqlCmd.Parameters.AddWithValue("@Password",
        utils.hashPassword(txtPassword.Text));
        int count = Convert.ToInt32(sqlCmd.ExecuteScalar());
        if (count == 1)
        {
            //Logged in
            MessageBox.Show('Logged in');
        }
        else
        {
            //Wrong details!
            MessageBox.Show('Wrong Details');
        }
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message);
    }
    finally
    {
        sqlCon.Close();
    }
}

public class utils
{
    public static string hashPassword(string password)
    {
        SHA1CryptoServiceProvider sha1 = new SHA1CryptoServiceProvider();

        byte[] password_bytes = Encoding.ASCII.GetBytes(password);
        byte[] encripted_bytes = sha1.ComputeHash(password_bytes);
        return Convert.ToBase64String(encripted_bytes);
    }
}