Reliably checking if a string is base64 encoded in .Net

Question

Before I start: Yes, I have checked the other questions and answers on this topic both here and elsewhere.

I have found an example string that the .Net will base64

Answer 1

There's a slightly better solution which also checks the input string length.

I recommend you do a check at the beginning. If the input is null or empty then return false.

http://www.codeproject.com/Questions/177808/How-to-determine-if-a-string-is-Base-decoded-or