C# windows forms gridview with checkbox sendmail

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C#2.0

C#

I am using with C# windows forms.

i am binding gridview .

i want to use checkbox in gridview for select all Row Or Single Row (like gmail imbox) in gridview.

i want to send mail to all selected row. by clicking Send Mail button which is located outside the gridview

this is code used for asp.net but i dont know how to write loop for gridview in the winodws application when user clicked checkbox

protected void SendMail()
    {
        string TotalMail;
        foreach (GridViewRow gvr in YourGridView.Rows)
        {
            CheckBox chkMail = (CheckBox)gvr.Cells[0].FindControl("chkMail");
            Label lblMailId = (Label)gvr.Cells[1].FindControl("lblMailId ");
         

            if(chkMail.Checked == true)
            {
                  TotalMail = TotalMail + lblColumn1.Text.ToString();
            }
        }
            objEmail          = new MailMessage();
            objEmail.To       = TotalMail;
            objEmail.From     = txtFrom.Text;
            objEmail.Subject  = "Test Email";
            objEmail.Body     = txtName.Text + ", " +
                                txtComments.Text;
            objEmail.Priority = MailPriority.High;
  //SmtpMail.SmtpServer = "localhost";
  try{
    SmtpMail.Send(objEmail);
    Response.Write("Your Email has been sent sucessfully - Thank You");
  }
  catch (Exception exc){
    Response.Write("Send failure: " + exc.ToString());