Creation and traversal implementation of DataTable in C#

/// <summary>
/// Create DataTable object/// </summary>
public static DataTable CreateDataTable()
{
  //Create DataTable  DataTable dt = new DataTable("NewDt");
      
  //Create a self-growing ID column  DataColumn dc = ("ID", ("System.Int32"));
   = true;  //Automatically increase   = 1; //The beginning is 1   = 1; //The step size is 1   = false;  //Not empty 
  //Create other lists  (new DataColumn("Name", ("")));
  (new DataColumn("Age", ("System.Int32")));
  (new DataColumn("Score", ("")));
  (new DataColumn("CreateTime", ("")));
 
  //Create data  DataRow dr = ();
  dr["Name"] = "Zhang San";
  dr["Age"] = 28;
  dr["Score"] = 85.5;
  dr["CreateTime"] = ;
  (dr);
 
  dr = ();
  dr["Name"] = "Li Si";
  dr["Age"] = 24;
  dr["Score"] = 72;
  dr["CreateTime"] = ;
  (dr);
 
  dr = ();
  dr["Name"] = "Wang Wu";
  dr["Age"] = 36;
  dr["Score"] = 63.5;
  dr["CreateTime"] = ;
  (dr);
 
  return dt;
}

/// <summary>
/// traverse the DataTable object and convert it into a List object/// </summary>
public static List<UserInfo> TraverseDataTable(DataTable dt)
{
  List<UserInfo> userList = new List<UserInfo>();
 
  //Judge whether DataTable is empty  if (dt == null ||  == 0)
  {
    return null;
  }
 
  //Transfer the DataTable object and convert it to List  foreach (DataRow row in )
  {
    UserInfo user = new UserInfo();
 
    if (("ID") && !(row["ID"]))
       = Convert.ToInt32(row["ID"]);
 
    if (("Name") && !(row["Name"]))
       = (row["Name"]);
 
    if (("Age") && !(row["Age"]))
       = Convert.ToInt32(row["Age"]);
 
    if (("Score") && !(row["Score"]))
       = (row["Score"]);
 
    if (("CreateTime") && !(row["CreateTime"]))
       = (row["CreateTime"]);
 
    (user);
  }
 
  return userList;
}

/// <summary>
/// User information category/// </summary>
public class UserInfo
{
  /// <summary>
  /// serial number  /// </summary>
  public int ID { get; set; }
 
  /// <summary>
  /// Name  /// </summary>
  public string Name { get; set; }
 
  /// <summary>
  /// age  /// </summary>
  public int Age { get; set; }
 
  /// <summary>
  /// score  /// </summary>
  public double Score { get; set; }
 
  /// <summary>
  /// Creation time  /// </summary>
  public DateTime CreateTime { get; set; }
}