gistfile1.txt

void Main()
{
    using (var stream = new MemoryStream())
    using (var writer = new StreamWriter(stream))
    using (var reader = new StreamReader(stream))
    using (var csv = new CsvReader(reader))
    {
        writer.WriteLine("Id,,Name");
        writer.WriteLine("1,,one");
        writer.WriteLine("2,,two");
        writer.Flush();
        stream.Position = 0;

        csv.Configuration.RegisterClassMap<TestMap>();
        csv.Read();
        for (var i = 0; i < csv.Context.Record.Length; i++)
        {
            csv.Context.Record[i] = csv.Context.Record[i] + i;
        }
        csv.ReadHeader();
        csv.GetRecords<Test>().ToList().Dump();
    }
}

public class Test
{
    public int Id { get; set; }
    public string Name { get; set; }
}

public sealed class TestMap : ClassMap<Test>
{
    public TestMap()
    {
        Map(m => m.Id).Name("Id0");
        Map(m => m.Name).Name("Name2");
    }
}