dtToObj.cs

// Install System.Data.DataSetExtensions from NUGET

using System;
using System.Linq;
using System.Data;

public class newClass
{
  public object DataTableToObject() 
  {
      DataTable search = new DataTable();
      search = utilities.sql.storedProcToTable([connectionName], [StoredProecude]);
  
      IList<CountyLookupSearch> items = search.AsEnumerable().Select(row =>
      new CountyLookupSearch
      {
          field1 = Convert.ToInt32(row.Field<char>("field1")),
          field2 = row.Field<string>("field2"),
          field3 = row.Field<int>("field3"),
          field4 = row.Field<string>("field4"),
          field5 = row.Field<string>("field5"),
          field6 = row.Field<string>("field6")
      }).ToList();
  }
}

public class Obj
{
    public int field1 { get; set; }
    public string field2 { get; set; }
    public int field3 { get; set; }
    public string field4 { get; set; }
    public string field5 { get; set; }
    public string field6 { get; set; }
}