Reverse Convert.ToBase64String（byte [] array）

Question

In example

string newString = Convert.ToBase64String(byte[] array)

How would I go about converting newString to get a byte[] (byte array)?

Answer 1

Convert.FromBase64String(newString)

Answer 2

byte[] data = Convert.FromBase64String(newString);
string decodedString = Encoding.UTF8.GetString(data);

Answer 3

byte[] array= Convert.FromBase64String(newString);