- As stated earlier, the Visual C++ project system is based on [MSBuild](/visualstudio/msbuild/msbuild-properties) and the values are stored in the XML project file, default .props and .targets files that (for Visual Studio 2015) are located in **\<drive>\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V140** and in custom .props files that you might add. We highly recommend that you use NOT edit those files manually, and instead use the property pages in the IDE to modify all properties, especially those that participate in inheritance, unless you have a very good understanding of MSBuild.
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