Have the script show error on dotnet tool failure

.pipelines/applyXamlStyling.ps1

@@ -40,6 +40,12 @@ Write-Output "Use 'Help .\applyXamlStyling.ps1' for more info or '-Main' to run
 Write-Output ""
 Write-Output "Restoring dotnet tools..."
 dotnet tool restore --disable-parallel --no-cache
+if ($lastExitCode -ne 0)
+{
+    $result = $lastExitCode
+    Write-Error 'Error running dotnet tool. Please verify the environment the script is running on.'
+    exit $result
+}
 
 if (-not $Passive)
 {

.pipelines/verifyNugetPackages.ps1

@@ -7,6 +7,13 @@ Param(
 Write-Host "Verifying Nuget packages for $solution"
 
 dotnet tool restore
+if ($lastExitCode -ne 0)
+{
+    $result = $lastExitCode
+    Write-Error 'Error running dotnet tool. Please verify the environment the script is running on.'
+    exit $result
+}
+
 dotnet consolidate -s $solution
 
 if (-not $?)