diff --git a/.github/actions/build-dotnet/Build-DotNetSolutionOrProject.ps1 b/.github/actions/build-dotnet/Build-DotNetSolutionOrProject.ps1
index 8e9e91b1f..f36566dda 100644
--- a/.github/actions/build-dotnet/Build-DotNetSolutionOrProject.ps1
+++ b/.github/actions/build-dotnet/Build-DotNetSolutionOrProject.ps1
@@ -69,6 +69,11 @@ dotnet build $SolutionOrProject @buildSwitches 2>&1 | ForEach-Object {
     if ($noErrors) { Write-Output "::error file=$file,line=$line,col=$column::$message" }
 }
 
+if ($noErrors -and !$?)
+{
+    exit 1
+}
+
 # With node reuse, dotnet build spawns processes that while speed up build, they can cause dotnet test and other dotnet
 # tools to randomly hang. So, here we shut down those processes for later actions.
 # For details see: https://github.com/Lombiq/UI-Testing-Toolbox/issues/228.