一个计数器的编程，是基于51内核的，很完整的实例程序-A counter programming is based on 51 core, it is full of examples of procedures

100 .net 对pdf 编程,内核也是 百分百c#编写，能创建和维护pdf格式文档。-TallPDF.NET and PDFKit.NET are 100 .NET components written entirely in C# for creating, manipulating and reading PDF documents and PDF forms.The focus is to ease the task of integrating our component