The input is not a valid Base-64 string as it contains a non-base64 character

Question

I have a REST service that reads a file and sends it to another console application after converting it to Byte array and then to Base64 string. This part works, but when th

Answer 1

Remove the unnecessary string through Regex

Regex regex=new Regex(@"^[\w/\:.-]+;base64,");
base64File=regex.Replace(base64File,string.Empty);