Extended ASCII in C#

Question

I want to store some of the extended ascii characters into a dictionary for lookup but having little issue with getting the conversion.

The current method I have to

Answer 1

I assume your "Extended ASCII" is actually code page 437:

Encoding cp437 = Encoding.GetEncoding(437);
byte[] source = new byte[1];
for (byte i = 0x20; i < 0xFE; i++)
{
    source[0] = i;
    AnsiLookup.Add(i, cp437.GetString(source));
}

Beware that this code page is not natively supported by the .NET Framework, so it might not be available on all systems.