xPackage, fixes bug preventing uninstalling software

CHANGELOG.md

@@ -6,6 +6,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 - xPackage
+  - Uninstalling software (Ensure = Absent) did not work due to improper handling of arguments. This fixes #704.
   - Fixed a bug not allowing using the file hash of an installer [Issue #702](https://github.com/dsccommunity/xPSDesiredStateConfiguration/issues/702).
 
 ### Fixed

source/DSCResources/DSC_xPackageResource/DSC_xPackageResource.psm1

@@ -539,30 +539,36 @@ function Set-TargetResource
             else
             {
                 # Absent case
-                $startInfo.FileName = "$env:winDir\system32\msiexec.exe"
-
-                # We may have used the Name earlier, now we need the actual ID
-                if ($null -eq $productEntry -or $null -eq $productEntry.Name)
+                try
                 {
-                    $id = $Path
+                    $startInfo.FileName = $productEntry.GetValue('UninstallString')
+
+                    if ($Arguments)
+                    {
+                        # Append the specified arguments with a space (#195)
+                        $startInfo.Arguments = " $Arguments"
+                    }
                 }
-                else
+                catch
                 {
-                    $id = Split-Path -Path $productEntry.Name -Leaf
-                }
+                    # We may have used the Name earlier, now we need the actual ID
+                    if ($null -eq $productEntry -or $null -eq $productEntry.Name)
+                    {
+                        $id = $Path
+                    }
+                    else
+                    {
+                        $id = Split-Path -Path $productEntry.Name -Leaf
+                    }
 
-                $startInfo.Arguments = "/x `"$id`" /quiet /norestart"
+                    $startInfo.FileName = "$env:winDir\system32\msiexec.exe"
+                    $startInfo.Arguments = "/x `"$id`" /quiet /norestart"
+                }
 
                 if ($LogPath)
                 {
                     $startInfo.Arguments += ' /log "{0}"' -f $LogPath
                 }
-
-                if ($Arguments)
-                {
-                    # Append the specified arguments with a space (#195)
-                    $startInfo.Arguments += ' {0}' -f $Arguments
-                }
             }
         }