How to achieve Base64 URL safe encoding in C#? -

How to achieve Base64 URL safe encoding in C#? -

i want accomplish base64 url safe encoding in c#. in java, have mutual codec library gives me url safe encoded string. how can accomplish same using c#?

byte[] toencodeasbytes = system.text.asciiencoding.ascii.getbytes("stringtoencode"); string returnvalue = system.convert.tobase64string(toencodeasbytes);

the above code converts base64, pads ==. there way accomplish url safe encoding?

it mutual simply swap alphabet utilize in urls, no %-encoding necessary; 3 of 65 characters problematic - +, / , =. mutual replacements - in place of + , _ in place of /. padding: just remove it (the =); can infer amount of padding needed. @ other end: reverse process:

string returnvalue = system.convert.tobase64string(toencodeasbytes) .trimend(padding).replace('+', '-').replace('/', '_');

with:

static readonly char[] padding = { '=' };

and reverse:

string incoming = returnvalue .replace('_', '/').replace('-', '+'); switch(returnvalue.length % 4) { case 2: incoming += "=="; break; case 3: incoming += "="; break; } byte[] bytes = convert.frombase64string(incoming); string originaltext = encoding.ascii.getstring(bytes);

the interesting question, however, is: is same approach "common codec library" uses? reasonable first thing test - pretty mutual approach.

c# encoding base64