Converting problem ANSI to UTF8 C#

Question

I have a problem with converting a text file from ANSI to UTF8 in c#. I try to display the results in a browser.

So I have a this text file with many accent characte

Answer 1

I would recommend to read this http://www.joelonsoftware.com/articles/Unicode.html.
If you are going to read a ASCII file you need to know the code page of the file.