See comments on byte order for the Read.. functions if you want to enforce a certain byte order. If a byte order is not specified, the data is written in the native byte order of the writing computer.

public void WriteReal(
	int i1,
	double d2
)

Public Sub WriteReal ( 
	i1 As Integer,
	d2 As Double
)

public:
void WriteReal(
	int i1, 
	double d2
)

member WriteReal : 
        i1 : int * 
        d2 : float -> unit