StreamReader sr = new StreamReader(FilePath);
importingData = new Account();
string line;
string[] row = new string [5];
while ((line = sr.ReadLine()) != null)
{
    row = line.Split(',');

    importingData.Add(new Transaction
    {
        Date = DateTime.Parse(row[0]),
        Reference = row[1],
        Description = row[2],
        Amount = decimal.Parse(row[3]),
        Category = (Category)Enum.Parse(typeof(Category), row[4])
    });
}