C#判断大小端并转换int数据

	private static bool _isBigEndian;
	private static bool _isEndianChecked = false;	
	private static bool IsBigEndian()
	{
		if( !_isEndianChecked )
		{
			_isEndianChecked = true;
			int nCheck = 0x01aa;
			_isBigEndian = ( nCheck & 0xff ) == 0x01;
		}		
		return _isBigEndian;
	}	
	private static int SwitchEndianInt( int inNum )
	{
		int nRet = ( inNum & 0xff ) << 24  |
			   ( inNum & 0xff00 ) << 8 |
         		   ( inNum >> 8 ) & 0xff00 |
			   ( inNum >> 24 ) & 0xff;
		return nRet;
	}