FromBase64String Method maximum length

Question

FromBase64String Method maximum length

Answer 1

Basically as long as is practical - you'll be hit by other limitations (maximum size of a string, or indeed any object) before you hit a problem in FromBase64String itself.

If you want to read huge amounts of base64 data, you'll need to split it up. So long as you read chunks which are multiples of 4 characters at a time, you should be able to transform it one chunk at a time without any problem.