C# int字节 转换Byte数组 3位

public byte[] GetByteByPoint(int point)
{
byte[] array = new byte[3];

array[0] = Convert.ToByte((point & 0xff0000) >> 16);
array[1] = Convert.ToByte((point & 0xff00) >> 8);
array[2] = Convert.ToByte(point & 0xff);

return array;
}

public byte[] GetByteByPoint1(int point)
{
return BitConverter.GetBytes(System.Net.IPAddress.HostToNetworkOrder(point));
}