I got the solution as follows:
 
SqlConnection conn = new SqlConnection(@"Data Source=COMP06\MSSQLSERVER2008R;Initial Catalog=EmployeeData;User ID=sa;Password=logical");
                conn.Open();
                SqlCommand cmd = new SqlCommand("select * from Register where EmailId='"+EmailIdText.Value+"'", conn);
                SqlDataReader dr = cmd.ExecuteReader();
                
               if (dr.Read())
                {
                    string Name = dr["FirstName"].ToString();
                    string psw = dr["Password"].ToString();
                    string UId = dr["UserId"].ToString();
                    
                     MailMessage msg = new MailMessage();
                     msg.From = new MailAddress("myemailid@gmail.com");
                     msg.To.Add(new MailAddress(EmailIdText.Value));    
                     msg.Subject = "Your Password is:";
                     msg.IsBodyHtml = true;
                     msg.Body ="<br><b>Hello,"+Name+"<br><br><b>Your User Id is: "+UId+ 
                         "<br><br><b>Your Password is  </b>" + psw + 
                         "<br><br><b>Name: </b>" + EmailIdText.Value;
                     SmtpClient smtp = new SmtpClient("smtp.gmail.com", 587);
                     smtp.Credentials = new  System.Net.NetworkCredential("myemailid@gmail.com", "mypassword");
                     smtp.EnableSsl = true;
                     smtp.Send(msg);
                     Label1.Text = "Your password is sent to your EmailId....!!";
                     dr.Close();
                     conn.Close();
                }
               
               
            }
            catch (Exception ex)
            {
                Label1.Text = ex.Message;
            }