I've noticed that when MSBuild fails, the value of the $LastExitCode variable is always 0. I'm on Windows 7, with MSBuild v4.0 and PowerShell 2.0. This is my MSBuild scritpt:

<?xml version="1.0" encoding="UTF-8"?>
<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="4.0" DefaultTargets="Fail">
    <Target Name="Fail">
        <Error />
    </Target>
</Project>

When I run:

msbuild.exe MyProject.csproj

I can see in the output that MSBuild fails, but when I check $LastExitCode, it has a value of 0. Anyone know what might be going on?

I've tried setting $(ErrorActionPreference) to Stop, but that didn't work. I re-opened a new PowerShell window, that didn't work either.

powershell msbuild
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