C# file download instance code (applicable to each browser)

public void DownFile(string filePath ,string fileName )
{
 // filePath file path For example: /File/Record.xlsx // fileName file name For example: record.xlsx (requires suffix)Encoding encoding; // Declare codestring outputFileName; // Output name( != null, " != null");
string browser = ();
// Microsoft's browser and ie filteringif (("MS") && ("IE"))
{
outputFileName = (filePath);
encoding = ;
}
//Firefoxelse if (("FIREFOX"))
{
outputFileName = fileName;
encoding = ("GB2312");
}
else
{
outputFileName = (fileName);
encoding = ;
}
string absoluFilePath = (filePath); //Get the upload file pathFileStream fs = new FileStream(absoluFilePath, );
byte[] bytes = new byte[(int)];
(bytes, 0, );
(); //Close the flow and release the resources();
 = true;
 = encoding;
("Content-Disposition", ("attachment; filename={0}", (outputFileName) ? ("yyyyMMddHHmmssfff") : outputFileName));
(bytes);
();
();
}