How do I concatenate 2 bytes?

Question

I have 2 bytes:

byte b1 = 0x5a;  
byte b2 = 0x25;

How do I get 0x5a25 ?

Answer 1

byte b1 = 0x5a;
byte b2 = 0x25;

Int16 x=0;

x= b1;
x= x << 8;
x +=b2;