How to distinguish Design time or Running time in Mobile cusotmer Contorl(the NetCF2.0 is different to NetCF1.0)

I run the "design a customer contorl for  mobile5" in  MSDN  ,but I get an unsuported error,I don't know how to reslove it ,pls. help me.

Scenario:
In page:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dv_evtuv/html/etwlkAuthoringCustomControlForSmartDeviceApplications.asp

 

The main step is:

Create the run-time version of the Graph custom control.

Compile the design-time version of the Graph custom control.

 

but when I test the custom contorl, It occur an unsupported Error.

 

investigate the reason ,I find in the top of graph class.

there is a sentence 

 #if NETCFDESIGNTIME
[assembly: System.CF.Design.RuntimeAssemblyAttribute("GraphControl, Version=1.0.845.15148, Culture=neutral, PublicKeyToken=null")]
#endif

 

but it is not supported in latest NetCF2.0,only in vs2003's NetCF1.0,we can find the System.CF.Design.dll

but in Vs2005 system.we can find below dll.

 

I think maybe it reason which I can't run it in vs2005 mobile environment.

 

but I don't know how to reslove it,Pls. help me