//类定义
    public class Classxxoo
    {                                                             
        private const int MAX_CLIPENUM_IN_BLOCK = 254;              
        private const int BLOCK_INDEX_NUM = (8 * 1024);           
                                                                  
        //[StructLayout(LayoutKind.Sequential)]
        private struct Block_File
        {
            public uint frameNum;  
            public uint clipStime; 
            public uint clipEtime; 
            public uint clip_size; 
            public uint index_num; 
        }                          

        //[StructLayout(LayoutKind.Sequential)]
        private struct clipIdx_info_t
        {
            public byte channel;
            public byte status;          
            public ushort fileInfoIdx;   
            public Block_File blkfile;   //注意，这一行注释掉就正常工作了
            public uint index_off;       
            public uint clip_off;        
        }                                

        //[StructLayout(LayoutKind.Sequential)]
        private struct KeyIndex
        {
            public uint cKeyOffset;    
            public uint TimeStampSec; 
        }

        //[StructLayout(LayoutKind.Sequential)]
        private struct blockIdx_info_t
        {
            public uint block_inf;   
            public uint block_size;  
            public uint block_no;    
            public byte channel;     
            public byte block_status;
            public byte block_type;  
            public byte clip_num;    
            public uint recover_num; 
            public uint write_Size;  
            public uint blockStime;  
            public uint blockEtime;  
            public uint index_num;   
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 28)]
            public byte[] rev;
      
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
            public clipIdx_info_t[] clip_info;
         
        }

        private blockIdx_info_t m_FileIndex;

        public Classxxoo( )
        {
            m_FileIndex = new blockIdx_info_t();
        }
    }


//------------------运行代码------------------------

    class Program
    {
        static void Main(string[] args)
        {
            Classxxoo xxoo = new Classxxoo( );
            Console.WriteLine(xxoo.ToString());
            Console.Read();
        }
    }