in embbeded system ,...

Ignore Thomas McNeely. Windows CE is by definition an embedded operating system.
 
Your question is not clear but the first place to look is the documentation provided with the hardware. The second place to look is the web site from the vendor for articles, samples and forums. The third place to look is someplace such as here.

Hi Sarona,
refer might get any help, Microsoft and the embedded systems
Also check Our recommended articles section.

Well, you're in the wrong place for anything embedded or real-time. C# is not the language for any type of real-time of embedded systems. There is no precise control of the behavior or workings of the code required for embedded systems. You are better off with assembly language, C or C++. Forget C#