Streamwriter将字符添加到第一行

Question

I am doing something rather simple in c#, writing a list of strings to text file. My write sub is:

public static bool TextToFile(string fileName, List<string> inString) {
    if (!Directory.Exists(Path.GetDirectoryName(fileName)))
        Directory.CreateDirectory(Path.GetDirectoryName(fileName));
    try {
        if (File.Exists(fileName))
            File.Delete(fileName);

        const int BufferSize = 65536;  // 64 Kilobytes
        using (StreamWriter sw = new StreamWriter(fileName, true, Encoding.UTF8, BufferSize)) {
            if (inString.Count > 0) {
                foreach (string str in inString) {
                    sw.WriteLine(str);
                }
            }
            else
                sw.WriteLine("");
        }
        return true;
    }
    catch {
        return false;
    }
}

I am getting extra stuff at the beginning of the first line though. It does not show in a regular text editor, but when I opened in ultraedit, and went to hex mode, I saw this:

My programs that read the text file do see the characters, and confuse it. My list of strings is super clean. I am sometimes writing 100 mb text files, so am setting the buffer to 64k, but I tried leaving it as default with same results. I am on win7 64 bit, using VS 2013.

Answer 1

我遇到了这个确切的问题，并且（由于对此问题的评论）将这些字符标识为字节顺序标记，然后允许我使用以下代码更改编码以排除BOM：

using (StreamWriter sw = new StreamWriter(fileName, true, new UTF8Encoding(false), BufferSize))