ulong to byte[]

[Nadav]

How can a UInt64 be converted to a byte[] ????

[Jon Skeet [C# MVP]]

Nadav <No*@today.com> wrote:

How can a UInt64 be converted to a byte[] ????

See BitConverter.GetBytes(ulong).

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

[Austin Ehlers]

On Sun, 4 Jan 2004 16:50:16 -0000, Jon Skeet [C# MVP]
<sk***@pobox.com> wrote:

Nadav <No*@today.com> wrote:

How can a UInt64 be converted to a byte[] ????

See BitConverter.GetBytes(ulong).

And if speed is a factor:
unsafe static byte[] GetBytes(UInt64 value)
{
byte[] bytes = new byte[8];
fixed(byte* b = bytes)
*((UInt64*)b) = value;
return bytes;
}
The BitConverter version has a couple layers of indirection, so its
about 3 times slower (GetBytes(value)>GetUInt64Bytes(value)>internal
runtime call). It's strange, they sometimes do internal calls (for
Integral types) and sometimes they write their own (for floating-point
types).

Austin