private void LoadFileForPreview(string fileToLoad)
{
IOResults ares = new IOResults();
bool firstLineIsHeader = true;// (bool)dataEntryForm.checkBoxModelFirstRowHeader.IsChecked;
var rawFileReader = new RawFileReader((fileToLoad.ToLower().IndexOf(".csv") > -1) ? ',' : '\t');
List<RawDataRow> dt = rawFileReader.LoadRawDataForPreview(fileToLoad, ares);
rawFileReader.PerformColumnLoad(fileToLoad, ares, rawFileReader.MaxCols, firstLineIsHeader, workerLoadData);
string ss = rawFileReader.GetColumnStats();
List<string> res = rawFileReader.DetermineColumnDataTypes();
columnDefs = new ModelColumnDefinitions();
// collect column assignments here
rawFileReader.SetColumnDefinitions(columnDefs);
}