private void InitializeFields()
{
importHeaders = new Dictionary <int, string> ();
// Insert an empty mapping for properties that will not be mapped
importHeaders.Add(-1, string.Empty);
foreach (string header in importer.GetDataHeaders(file))
{
importHeaders.Add(importHeaders.Count - 1, header);
}
foreach (ImportProperty prop in ExchangeHelper.GetExchangeInfo <ImportProperty> (typeof(T)))
{
AppendProperty(prop);
}
}