How can I determine the encoding method of a text file?

Text files usually identify their encoding methods through the first two bytes, but UTF-32 encoding uses the first four bytes to identify their encoding methods. The following are some encoding format identifiers:

Encoding Method	First few bytes
ANSI	No format definition
Unicode	FF fe
Unicode big endian	Fe FF
UTF-8	EF bb
UTF-16/UCS-2, little endian	Fe FF
UTF-16, UCS-2, big endian	FF fe
UTF-32/UCS-4, little endian	FF Fe 00 00
UTF-32, UCS-4, big-Endian	00 00 Fe FF

In this way, we writeCodeYou only need to read the first two bytes of the file ~ 4 bytes to know the encoding method. However, in. net, there is another simpler way to know the encoding method of text files and use the following code:

Public encoding getencoding (string file)
{
VaR r = new streamreader (file, true); // true indicatesProgramAutomatic file encoding
Return R. currentencoding; // return code
}