C# SDcard源码，实现对SD卡扇区的读写，并了解其在C#中的原理，包括API的使用情况，下载后请重新编译源码，在Bin目录下可运行编译生成的Exe文件。-C# SDcard source code, to achieve the SD card sector read and write, and understand its principles in C#, including use of the API, please recompile the source code downl