.net – WPF app builds in vs2k8, but not on command line w/ msbuild

I have a fairly small solution that includes a WPF windows application. It builds perfectly fine when built from the solution. I recently integrated the projects contained within the solution into an existing, much larger command line build that uses MSBuild. When built from the command line, however, I get the following errors:

MainWindow.xaml.cs(12,4): error CS0103: The name 'InitializeComponent' does not exist in the current context
View\EngineMonitorView.xaml.cs(12,4): error CS0103: The name 'InitializeComponent' does not exist in the current context
View\HostingEngineView.xaml.cs(12,4): error CS0103: The name 'InitializeComponent' does not exist in the current context
View\MainView.xaml.cs(13,4): error CS0103: The name 'InitializeComponent' does not exist in the current context
View\MainView.xaml.cs(17,52): error CS0103: The name 'gView' does not exist in the current context
View\PerformanceCounterView.xaml.cs(22,4): error CS0103: The name 'InitializeComponent' does not exist in the current context
View\PerformanceCounterView.xaml.cs(117,22): error CS0103: The name 'cnvsCounterGrid' does not exist in the current context
View\PerformanceCounterView.xaml.cs(118,20): error CS0103: The name 'cnvsCounterGrid' does not exist in the current context
View\PerformanceCounterView.xaml.cs(127,4): error CS0103: The name 'cnvsCounterGrid' does not exist in the current context
View\PerformanceCounterView.xaml.cs(138,5): error CS0103: The name 'txtScale' does not exist in the current context
View\PerformanceCounterView.xaml.cs(179,5): error CS0103: The name 'txtLast' does not exist in the current context
View\PerformanceCounterView.xaml.cs(180,5): error CS0103: The name 'txtMin' does not exist in the current context
View\PerformanceCounterView.xaml.cs(181,5): error CS0103: The name 'txtMax' does not exist in the current context
View\PerformanceCounterView.xaml.cs(189,5): error CS0103: The name 'txtAverage' does not exist in the current context
View\PerformanceCounterView.xaml.cs(250,4): error CS0103: The name 'cnvsCounterGrid' does not exist in the current context
View\PerformanceCounterView.xaml.cs(251,4): error CS0103: The name 'cnvsCounterGrid' does not exist in the current context
View\PerformanceCounterView.xaml.cs(253,27): error CS0103: The name 'cnvsCounterGrid' does not exist in the current context
View\PerformanceCounterView.xaml.cs(255,27): error CS0103: The name 'cnvsCounterGrid' does not exist in the current context
View\PerformanceCounterView.xaml.cs(264,4): error CS0103: The name 'cnvsCounterGrid' does not exist in the current context
View\PerformanceCounterView.xaml.cs(269,4): error CS0103: The name 'cnvsCounterGrid' does not exist in the current context
View\PerformanceCounterView.xaml.cs(274,4): error CS0103: The name 'cnvsCounterGrid' does not exist in the current context
View\PerformanceCounterView.xaml.cs(279,4): error CS0103: The name 'cnvsCounterGrid' does not exist in the current context
View\PerformanceCounterView.xaml.cs(293,5): error CS0103: The name 'cnvsCounterGrid' does not exist in the current context
View\PerformanceCounterView.xaml.cs(303,5): error CS0103: The name 'cnvsCounterGrid' does not exist in the current context
View\PerformanceCounterView.xaml.cs(318,5): error CS0103: The name 'cnvsCounterGrid' does not exist in the current context
View\PerformanceCounterView.xaml.cs(325,5): error CS0103: The name 'cnvsCounterGrid' does not exist in the current context
View\PerformanceCounterView.xaml.cs(342,4): error CS0103: The name 'cnvsCounterGrid' does not exist in the current context
View\ServerMonitorView.xaml.cs(12,4): error CS0103: The name 'InitializeComponent' does not exist in the current context
View\ServerTreeView.xaml.cs(12,4): error CS0103: The name 'InitializeComponent' does not exist in the current context
View\ServiceDetailView.xaml.cs(12,4): error CS0103: The name 'InitializeComponent' does not exist in the current context
View\ServiceMonitorView.xaml.cs(12,4): error CS0103: The name 'InitializeComponent' does not exist in the current context

I included the WinFX targets file from .NET 3.5 in our root MSBuild .proj file, as it did not appear to be included anywhere else:

<Import Project="$(MSBuildBinPath)\Microsoft.WinFX.targets" />

That did not seem to affect anything, though, and I am still encountering the errors. As far as I can tell, it appears that the custom WPF build tasks that precompile the .xaml files into .cs files, embeds and wires up resources, etc. are not running, which is why InitializeComponent and any controls defined in my views are not found. I am at a loss as to why, though…and trying to wade through the zillions of search results related to WPF and MSBuild is not getting me anywhere.

UPDATE:

Adding the Microsoft.WinFX.targets to the .csproj file seems like it would work. However, doing so causes the project to fail to build within Visual Studio 2008. Somehow, VS is including those targets for you…but I am unsure how. Does anyone know more about how VS builds WPF projects? Is there a master build file hiding somewhere that imports the appropriate targets?