How can I exclude a project from a build in MSBuild?

Question

I need to build a solution, but exclude one project. How should I do it?

I searched a lot about this issue, but nothing could help.

An ItemGroup

Answer 1

create a master.proj file:

in another ItemGroup add DefaultExclude properties for programs - put it in front of the solution -- BA was Canadian
Configuration=Release Release drop the master.proj into the directory with the programs and msbuild the master.proj compiles everything except... that HelloWorld