c# - How to Serialize object to binary? -

i'm creating phone book in windows forms, , need write contactlist in binaryform save data.

what best way it? shall write several fields seperately, or can write , read full object?

contact has fields :

• guid id
• string name
• string lastname
• string email
• string phonenumber

class (needs serializable):

[serializable] public class sometype {     public int x { set; get; }     public int y { set; get; } } 

using binary writer:

public static byte[] serialize(sometype obj) {     byte[] bytes = null;      using (var stream = new memorystream())     {         using (var writer = new binarywriter(stream))         {             writer.write(obj.x);             writer.write(obj.y);         }          bytes = stream.toarray();     }      return bytes; }  public static sometype deserialize(byte[] data) {     var obj = new sometype();      using (var stream = new memorystream(data))     {         using (var reader = new binaryreader(stream))         {             obj.x = reader.readint32();             obj.y = reader.readint32();         }     }      return obj; } 

usage:

var obj = new sometype() { x = 10 };  byte[] data = serialize(obj);  sometype obj2 = deserialize(data); 

or binaryformatter :

byte[] data = null;  using (memorystream ms = new memorystream()) {     binaryformatter binaryformatter = new binaryformatter();     binaryformatter.serialize(ms, obj);     data =  ms.toarray(); }  using (memorystream ms = new memorystream(data)) {     binaryformatter binaryformatter2 = new binaryformatter();     var objdeserialized = binaryformatter2.deserialize(ms) sometype; }