IT業界のすみっこ暮らし

public byte[] GetCsv() { var stream = new MemoryStream(); var csvWriter = new StreamWriter(stream, Encoding.GetEncoding("shift-jis")); csvWriter.WriteLine(String.Format("{0},{1},{2},{3}", "aaa", "bbb", "ccc", "ddd")); csvWriter.Flush(); return stream.ToArray(); }