BINARY

Person person = new Person(); 
person.Name = "something"; 

MemoryStream memorystream = new MemoryStream(); 
BinaryFormatter bf = new BinaryFormatter(); 
bf.Serialize(memorystream, person); 

use Base 64 (e.g. Convert.ToBase64String and Convert.FromBase64String).
Do not use Encoding.UTF8.GetString or anything similar - your binary data is not encoded text data, and shouldn't be treated as such.

MemoryStream memoryStream = new MemoryStream(); 
BinaryFormatter binaryFormatter = new BinaryFormatter(); 
binaryFormatter.Serialize(memoryStream, Person); 
memoryStream.Flush(); 
memoryStream.Position = 0; 
string value = Convert.ToBase64String(memoryStream.ToArray());