private void SetChildrenCountControls(int total)
        {
          for (int i =0; i < total; i++)
          {
            var tbBirthDate = new TextBox();
           
tbBirthDate.ID = "tbBirthDate_" + (i + 1);
           
tbBirthDate.CssClass = "tbSister_input";
           
tbBirthDate.EnableViewState = true;
 
            FileUpload upload = new FileUpload();
            upload.ID= "imgUpload_" + (i + 1);
           
upload.CssClass = "tbSister_upload";
           
upload.EnableViewState = true;
 
           
ChildrenCountTextPanel.Controls.Add(tbBirthDate);
           
ChildrenCountTextPanel.Controls.Add(upload);
          }
       }    

And can get the enterede text in the txtbox with:

 
    protected void lbFamilySave_Click(object sender, EventArgs e)
    {
        var
countSisters = ChildrenCountTextPanel.Controls.OfType<TextBox>();
        string sisterBirth = string.Empty;
        foreach (var sister in countSisters)
        {
            if(sister.ID.Contains("tbBirthDate_"))
                sisterBirth = sister.Text;
        }
    } 

How can i get the file from the FileUpload controls? Cant seem to do above with FileUpload.