请教一个error C2872: “IServiceProvider”: 不明确的符号有关问题

请问一个error C2872: “IServiceProvider”: 不明确的符号问题？

C/C++ code

#include<Winsock2.h>#using <System.dll>#using <System.Security.dll>#using <System.Xml.dll>#import "C:\Program Files\Common Files\System\ado\msado15.dll" no_namespace rename("EOF","rsEOF")using namespace System;using namespace System::IO;using namespace System::Xml;using namespace System::Security::Cryptography;using namespace System::Security::Cryptography::Xml;using namespace System::Security::Cryptography::X509Certificates;using namespace System::Text;using namespace DevelopDotNet::Compression;

C:\Program Files\Microsoft SDKs\Windows\v6.0A\include\ocidl.h(6238) : error C2872: “IServiceProvider”: 不明确的符号
1> 可能是“c:\program files\microsoft sdks\windows\v6.0a\include\servprov.h(103) : IServiceProvider”
1> 或 “c:\windows\microsoft.net\framework\v2.0.50727\mscorlib.dll : System::IServiceProvider”
1>d:\program files\microsoft visual studio 9.0\vc\include\comdefsp.h(1041) : error C2872: “IServiceProvider”: 不明确的符号
1> 可能是“c:\program files\microsoft sdks\windows\v6.0a\include\servprov.h(103) : IServiceProvider”
1> 或 “c:\windows\microsoft.net\framework\v2.0.50727\mscorlib.dll : System::IServiceProvider”
1>d:\program files\microsoft visual studio 9.0\vc\include\comdefsp.h(1041) : error C2872: “IServiceProvider”: 不明确的符号
1> 可能是“c:\program files\microsoft sdks\windows\v6.0a\include\servprov.h(103) : IServiceProvider”
1> 或 “c:\windows\microsoft.net\framework\v2.0.50727\mscorlib.dll : System::IServiceProvider”
这个错怎么解决呀？求救了呀！

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引用:
删除using namespace System

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1、直接用名称空间限定 System::IServiceProvider
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sdk版本太低了