How do I convert hex to ascii/extended ascii without question mark?

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I would like to convert hexadecimal value to ASCII/extended ASCII, but the ASCII characters do not properly how in Notepad++. Instead it shows as question mark(?)

Can anybody help me to convert hex to ASCII/extended ASCII?

What I have tried:

C#

string p = "7E 3E 44 C2 80 0E C2 A0"; //"24A".PadLeft(8,'0');
var bytessss = p.Split(' ').Select(hb => Convert.ToByte(hb, 16)).ToArray(); // converts string -> byte using base 16
var asciiStr = System.Text.Encoding.ASCII.GetString(bytessss);
File.WriteAllText(@"test.txt", asciiStr, Encoding.ASCII);

Result for the above hex is: ~>D????

Posted 26-Jan-22 1:04am

Member 3746307

Updated 26-Jan-22 3:49am

Sean Ewington

v3

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Richard Deeming · Accepted Answer · 2022-01-26T01:35:00

Those bytes do not represent a valid sequence of ASCII characters. You cannot use the ASCII encoding to process them.

You'll need to use the appropriate encoding for your text. For example:

ASCII: ~>D??0E??
ISO-8859-1: ~>DÂ€0EÂ
UTF-8: ~>D0E
Unicode: 㹾쉄຀ꃂ

None of these appear to be correct, so you'll need to find out which encoding was used to produce the source data.