This ensures that default values brought in the system property sheets are overridden by user defined values. when you define a property value in the property pages, the IDE will generally place the property definition in the property group with the empty label. The above ordering ensures that editing the project file via that IDE gives expected results. In one of the imports of, we can see the line: Will be included (as can be seen in the Property Manager). Let me explain what each of these elements are and why they are ordered this way. Note that Labels are arbitrary tags only read and written by Visual Studio and used as signposts for editing they have no other function. vcxproj file generated by VS will contain these top-level MSBuild elements and in this particular order (although they may contain multiple copies of each such top-level element). The following skeletal (but legal) MSBuild file captures the layout succinctly. Having said that, let me now show you the layout. What I say about properties here is also true about item definition metadata (in general, this holds true for the entire article). You could have included it via some import that is imported before the second definition of the property. The first property definition need not necessarily be in the project file itself. So, the value “xyz” will be used during build time. If your project file consists of two definitions of a property, such as below, the last definition overrides the preceding ones. The concept of an ordered layout is a natural outcome of MSBuild’s sequential evaluation model. What is the purpose of this ordered layout? Why are there multiple property groups (import groups, etc.) instead of only one? Well, read on. ![]() Then there are multiple property groups – distinguished by Label s on them – and they occur in a particular order. Also, all targets are imported at the end of the project file. ![]() Notice, e.g., that most of the property groups and item definition groups occur after the import for. vcxproj file (the new VC++ project file format in VS2010) in notepad or in VS editor (by first unloading the project and then choosing “Edit Foo.vcxproj” from the context menu in Solution Explorer), you will see that the various top-level MSBuild elements are laid out in a particular order.
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