C#

30      
31                  List<Record> UnsortedRecords = new List<Record>();
32                  UnsortedRecords.Add(new Record("City",   "Florida",    "Miami"));
33                  // The rest of the adds are removed in order to compact the code
34       
35                  List<Record> SortedRecords = SortRecords(UnsortedRecords);
36              }
37      
38              // You can either replace the ArrayList with a List<T>[^], or use the Cast[^] or OfType[^] 
39              // methods to convert it to an IEnumerable<T>.
40              public static IEnumerable<Record> SortRecords(IEnumerable<Record> source)
41              {
42                  IEnumerable<IEnumerable<Record>> groupT = System.Linq.Enumerable.GroupBy<Record, string, IEnumerable<Record>>
43                      (source,
44                      delegate(Record r) { return r.column1; },
45                      delegate(
46                      string key, IEnumerable<Record> items)
47                      {
48                          IEnumerable<System.Linq.IGrouping<string, Record>> groupH = System.Linq.Enumerable.GroupBy<Record, string>(items, delegate(Record r) { return r.column2; });
49                          return System.Linq.Enumerable.SelectMany<IEnumerable<Record>, 
50                              Record>(groupH, 
51                              delegate(IEnumerable<Record> g) { 
52                                     return g; });
53                      });
54      
55                  return System.Linq.Enumerable.SelectMany<IEnumerable<Record>, Record>(groupT, delegate(IEnumerable<Record> g) { return g; });
56              }
57          }
58      }

IEnumerable<Record> SortedRecords = SortRecords(UnsortedRecords);

// Or:
List<Record> SortedRecords = System.Linq.Enumerable.ToList<Record>(SortRecords(UnsortedRecords));

return System.Linq.Enumerable.SelectMany<IEnumerable<Record>, Record>(
    groupH, 
    delegate(IEnumerable<Record> g) { return g; });

return System.Linq.Enumerable.SelectMany<IGrouping<string, Record>, Record>(
    groupH, 
    delegate(IGrouping<string, Record> g) { return g; });

        public static IEnumerable<Record> SortRecords(IEnumerable<Record> source)
        {
            IEnumerable<IEnumerable<Record>> groupT = System.Linq.Enumerable.GroupBy<Record, string, IEnumerable<Record>>
                (source,
                delegate(Record r) { return r.column1; },
                delegate(string key, IEnumerable<Record> items)
                {
                    IEnumerable<System.Linq.IGrouping<string, Record>> groupH = 
                        System.Linq.Enumerable.GroupBy<Record, string>(items, delegate(Record r) { return r.column2; });
                    return System.Linq.Enumerable.SelectMany<System.Linq.IGrouping<string, Record>, Record>(groupH,
                        delegate(System.Linq.IGrouping<string, Record> g)
                        { 
                             return g; 
                        });
                });
            return System.Linq.Enumerable.SelectMany<IEnumerable<Record>, Record>(groupT, delegate(IEnumerable<Record> g) { return g; });
        }

IEnumerable<Record> SortedRecords = SortRecords(UnsortedRecords);

List<Record> SortedRecordsList = new List<Record>();
IEnumerator<Record> Enumerator = SortedRecords.GetEnumerator();

while (Enumerator.MoveNext())
{
    SortedRecordsList.Add(Enumerator.Current);
}

List<Record> SortedRecordsList = new List<Record>();
SortedRecordsList.AddRange(SortedRecords);

List<Record> SortedRecordsList = System.Linq.Enumerable.ToList<Record>(SortedRecords);

public class MyClass : ClassImDerivedFrom
   {
   private string myField;
   public string MyProperty {get; set; }
   }

OriginalGriff wrote:

I can't teach you how to create classes in C#

nisss wrote:

There is a new project I created within the solution. If you get the latest version of the solution from source control you should see it. There are currently no classes in it.