How to get current User's Manager Name and Manager Email in a visual webpart

Hi,

I am new to programming, I have a requirement to get current userInfo and Manager's info on to a visual webpart.

I am using

  protected void Page_Load(object sender, EventArgs e)
        {
            SPUser user = SPContext.Current.Web.CurrentUser;
            txt1.Text = user.Name;
            txt2.Text = user.LoginName;
            txt3.Text = user.Email;
         }

to get current user info and it works, can anyone help me or send a link to get current User's Manager's Info, any help will be appreciated.