public async Task <bool> CanImportAsync(IDictionary <string, TData> data, IDataAccessFacade <TData> access) { var csvs = data.Keys.Where(filename => Path.GetExtension(filename).Equals(".csv", StringComparison.OrdinalIgnoreCase)).ToArray(); if (csvs.Any()) { foreach (var csv in csvs) { using (var stream = await Reader.OpenStreamProvider(await access.GetFileAsync(csv))) { int i = 3; using (var reader = new StreamReader(stream)) { //Goto line 3 string line = null; while (i-- > 0) { line = await reader.ReadLineAsync(); } ParseHeaderData(line); if (Headers.Count == 12 && line.StartsWith(TABLE_HEADER_START)) { return(true); } } } } } return(false); }