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# Mapping Duplicate Names
Sometimes you have duplicate header names. This is handled through a header name index. The name index is the index of how many occurrences of that header name there are, not the position of the header.
###### Data
```
Id,Name,Name
1,first,last
```
###### Example
```cs
void Main()
{
using (var reader = new StreamReader("path\\to\\file.csv"))
using (var csv = new CsvReader(reader, CultureInfo.InvariantCulture))
{
csv.Context.RegisterClassMap<FooMap>();
var records = csv.GetRecords<Foo>();
}
}
public class Foo
{
public int Id { get; set; }
public string FirstName { get set; }
public string LastName { get; set; }
}
public sealed class FooMap : ClassMap<Foo>
{
public FooMap()
{
Map(m => m.Id);
Map(m => m.FirstName).Name("Name").NameIndex(0);
Map(m => m.LastName).Name("Name").NameIndex(1);
}
}
```
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