How to pass large number of parameters to a constructor?

Question

I am having a main form named "add.cs" containing user information (its name , age ....etc.) on this form i have drag a button to add the user's children information (their name , blood group , date of birth..etc)whose click event opens a form "addchild.cs" on which i have dragged two button one for stroring data and another to add controls at runtime. To add controls at runtime i have used this coding

private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                childrenCount++;

                Label lblchild = new Label();
                lblchild.BorderStyle = BorderStyle.Fixed3D;
                lblchild.Location = new Point(20, (childrenCount - 1) * 50);
                lblchild.Size = new System.Drawing.Size(50, 20);
                lblchild.Text = "Child  " + (childrenCount - 1);
                TextBox tName = new TextBox(); //TextBox for the name
                tName.BorderStyle = BorderStyle.Fixed3D;
                tName.Location = new Point(120, (childrenCount - 1) * 50);
                tName.Size = new System.Drawing.Size(135, 60);
                tName.Text = "";
                DateTimePicker calendar = new DateTimePicker();
                //MonthCalendar calendar = new MonthCalendar(); //Calendar to choose the birth date
                calendar.Location = new Point(310, (childrenCount - 1) * 50);
                ComboBox bloodGroup = new ComboBox(); //ComboBox for the blood group
                bloodGroup.Location = new Point(650, (childrenCount - 1) * 50);
                bloodGroup.Size = new System.Drawing.Size(135, 60);
                for (Enum.Blood_Group l = Enum.Blood_Group.O_negative; l <= Enum.Blood_Group.AB_positive; l++)
                {
                    bloodGroup.Items.Add(l);
                }

                this.panel1.Controls.Add(lblchild);
                this.panel1.Controls.Add(tName);
                this.panel1.Controls.Add(calendar);
                this.panel1.Controls.Add(bloodGroup);


            }

            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }

        }

Now I have created a separate external class named "Childrendata" for storing the value of controls added on " addchild.cs". These class contains all the data that i want to store.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
 
namespace Jain_milan
{
    class Childrendata
    {
        string childname, childblood, childbirth;
 

        public string Childbirth
        {
            get { return childbirth; }
            set { childbirth = value; }
        }
 
        public string Childblood
        {
            get { return childblood; }
            set { childblood = value; }
        }
 
        public string Childname
        {
            get { return childname; }
            set { childname = value; }
        }
 
    }
} 

then on the click event of the submission button on addchild.cs i have 
used this code to store the controls data to the variables of external 
class called Childdata.cs.

private void submitbtn_Click(object sender, EventArgs e)
        {
            //Checks the values
            try
            {
                string message = "";
                foreach (Control c in this.Controls)
                { //loop throught the elements of the form
                    if (c.GetType() == typeof(Panel))
                    { //check if the control is a Panel
                        //Get the values from the input fields and add it to the message string
                        Panel panel1 = (Panel)c;
                        Label lblchild = (Label)(c.Controls[0]);
                        TextBox tName = (TextBox)(c.Controls[1]);
                        DateTimePicker calendar = (DateTimePicker)(c.Controls[2]);
                        ComboBox bloodGroup = (ComboBox)(c.Controls[3]);
 
                        //add to class
                        Childrendata childdata=new Childrendata();
                        childdata.Childname = tName.Text;
                        childdata.Childblood= bloodGroup.Text;
                        childdata.Childbirth=calendar.Text;
 

                    }
                }
            }
 
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
         }

Now how can i made the constructor taking array or any other 
thing as parameter and that store all the values and i can call this 
constructor to my main page named add.cs .So on click event of a button 
on add.cs i may store these values into database by using coding like this.

Childrendata cd = new Childremdata();
Children child = new Children();
 
                    child.Namechild = cd.Childname;
                    child.Bloodchild = cd.Childblood;
                    child.Dobchild = cd.Childbirth;
                    if (new InsertAction().Insertchildren(child))
                    {
                        MessageBox.Show(" Children Insertion Happen ");
                    }
                    else
                    {
                        MessageBox.Show(" Children Insertion does not Happen ");
                    }">

Please tell me the exact example because i have tried a-lot to solve this but no output!! Please help please please please