On Tue, 25 Nov 2014 19:35:43 GMT, Jan wrote:

I want to read a non array...

I have this code : 

ubyte[] operation;
conn.read(operation);
handleP(conn, this, opcode);

i want to read regular, not array, how to do this ?

Every type is transferrable to a sequence of ubyte[] using this syntax: 

int operation;
conn.read((cast(ubyte*) &operation)[0 .. int.sizeof]);

However, you should definitely use a serialization tool to move this into a lower level of abstraction.