C#創建UTF8無BOM文本文件

In order to omit the byte order mark (BOM), your stream must use a custom instance of UTF8Encoding instead of the default System.Text.Encoding.UTF8:

1.Call the UTF8Encoding constructor with False for the encoderShouldEmitUTF8Identifier parameter.

2.Pass the UTF8Encoding instance to the stream constructor.

實例：

 utf8WithoutBom =  System.Text.UTF8Encoding(
 ( sink =  StreamWriter(, 

Note that omitting the BOM is only permissible for UTF-8, not for UTF-16.