I have been working with MSBuild for many years and as many people know, MSBuild has typically been located here: C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
However, when attempting to build a Visual Studio 2013 project using MSBuild, I received the following error message:
The imported project "C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v11.0\WebApplications\Microsoft.WebApplication.targets" was not found. Confirm that the path in the declaration is correct, and that the file exists on disk.
Then after some research, I found this article: http://timrayburn.net/blog/visual-studio-2013-and-msbuild/
This indicated the the location of MSBuild moved to a new path here (for 64-bit version): C:\Program Files (x86)\MSBuild\12.0\bin\amd64\msbuild.exe. (The path for the 32-bit version is C:\Program Files (x86)\MSBuild\12.0\bin\msbuild.exe)
After changing the location of my MSBuild executable to this new path, and re-building using MSBuild, my build completed successfully!