Decode S-JIS string to UTF-8 - asp.net

Question

I am working on a Japanese File and I have no knowledge of the language. The file is encoded in S-JIS. Now, I am supposed to convert the contents into UTF-8 so that the content looks like Japanese. And here I am completely blank. I tried the following code that I found somewhere on Internet but no luck:
byte[] arrByte = Encoding.UTF8.GetBytes(arrActualData[x]);
string str = ASCIIEncoding.ASCII.GetString(arrByte);
Can anyone help me with this?
Thanks in advance
Kunal

Answer 1

In C#, the following code works for me.
I wanted to try this out so evidence of my results below:
public void Convert()
{
using (TextReader input = new StreamReader(
new FileStream("shift-jis.txt", FileMode.Open),
Encoding.GetEncoding("shift-jis")))
{
using (TextWriter output = new StreamWriter(
new FileStream("utf8.txt", FileMode.Create), Encoding.UTF8))
{
var buffer = new char[512];
int len;
while ((len = input.Read(buffer, 0, 512)) > 0)
{
output.Write(buffer, 0, len);
}
}
}
}
Shown here is the file encoded in shift-jis (or SJIS/Shift_JIS they are the same), using JEdit to verify the encoding (the word in the file is the japanese text テスト meaning test):
After running the code & opening the file written to (utf8.txt) :
But it should be said that such a file conversion does not strictly require knowledge of any language.