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我在 Visual Studio 2008 (Visual Basic) 中有一个应用程序并安装了 Visual Studio Express 2012，当我尝试将 DataRepeater 添加到现有项目中的新表单时，它说已经存在，当我尝试添加 PrintForm 时也是如此。我不能以任何新的或预先存在的形式添加新的对象。

这是我收到的邮件内容：

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Microsoft Visual Studio Express 2012 for Windows Desktop
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Failed to create component 'DataRepeater'.  The error message follows:

 'System.Runtime.InteropServices.COMException (0x8004D745): A reference to the component 'Microsoft.VisualBasic.PowerPacks.Vs' already exists in the project.

   at VSLangProj.References.Add(String bstrPath)

   at Microsoft.VisualStudio.Design.VSTypeResolutionService.PerformReferenceUpdate(List`1 newReferences)

   at Microsoft.VisualStudio.Design.VSTypeResolutionService.System.ComponentModel.Design.ITypeResolutionService.ReferenceAssembly(AssemblyName name)

   at Microsoft.VisualStudio.Design.Serialization.CodeDom.AggregateTypeResolutionService.ReferenceAssembly(AssemblyName name)

   at System.Drawing.Design.ToolboxItem.GetType(IDesignerHost host, AssemblyName assemblyName, String typeName, Boolean reference)

   at System.Drawing.Design.ToolboxItem.CreateComponentsCore(IDesignerHost host)

   at System.Drawing.Design.ToolboxItem.CreateComponentsCore(IDesignerHost host, IDictionary defaultValues)

   at System.Drawing.Design.ToolboxItem.CreateComponents(IDesignerHost host, IDictionary defaultValues)

   ...'
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OK   
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它说了一些关于参考更新的内容，我不是 vb.net 的经验丰富的开发人员，所以不知道我应该去哪里修复它以及如何修复它。

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