How do I encode and decode a base64 string? - Stack Overflow
https://stackoverflow.com/questions/11743160/how-do-i-encode-and-decode-a-base64-string
WEBJul 31, 2012 · For those that simply want to encode/decode individual base64 digits: public static int DecodeBase64Digit(char digit, string digit62 = "+-.~", string digit63 = "/_,") {. if (digit >= 'A' && digit <= 'Z') return digit - 'A'; if (digit >= 'a' && digit <= 'z') return digit + (26 - 'a'); if (digit >= '0' && digit <= '9') return digit + (52 - '0');
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