Added Remove all but latest, silent uninstall minus elevation prompt

Get-DotNetCoreProducts.ps1

@@ -0,0 +1,18 @@
+#Requires -Version 3.0
+Param ()
+
+#Host consists of Runtime, Host and Host FX Resolver
+$Products = @('Microsoft .NET Core Runtime -*',
+              'Microsoft .NET Core Host -*', 
+              'Microsoft .NET Core Host FX Resolver -*',
+              'Microsoft .NET Core SDK*',
+              'Microsoft ASP.NET Core*')
+$Products | ForEach-Object {
+    $Product = $_
+    #Get all installed apps from Registry matching .Net Core SDK
+    Get-ItemProperty 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*'  | 
+        Where-Object {$_.displayname -like $Product} | 
+        Sort-Object { [System.Version]::new($_.DisplayVersion)} -Descending | 
+        Select-Object DisplayName, DisplayVersion, UninstallString 
+}
+#Best viewed with .\Get-DotNetCoreProducts.ps1 | FT -autosize 

Remove-DotNetCoreProducts.ps1

@@ -0,0 +1,80 @@
+<#
+ .SYNOPSIS
+    Removes older dotnetcore products
+
+ .DESCRIPTION
+    Removes all dotnetcore products except for latest version or removes all versions
+
+    Currently removes the following products:
+      * Microsoft .NET Core Runtime
+      * Microsoft .NET Core Host
+      * Microsoft .NET Core Host FX Resolver
+      * Microsoft .NET Core SDK
+      * Microsoft ASP.NET Core
+
+ .PARAMETER RemoveAll
+ Switch to force removal of all versions of dotnetcore products
+#>
+
+#Requires -Version 3.0
+#Requires -RunAsAdministrator
+[CmdletBinding(SupportsShouldProcess=$true)]
+Param (
+    [switch] $RemoveAll
+)
+
+#Function to remove a single version of dotnetCore - supports -whatif
+Function Remove-DotNetCore {
+    [CmdletBinding(SupportsShouldProcess=$true)]
+    param ([string] $GUID )
+
+    if ($PSCmdlet.ShouldProcess($GUID)) {
+        pushd $env:SYSTEMROOT\System32
+        Start-Process msiexec -wait -ArgumentList ("/x $GUID /qn IGNOREDEPENDENCIES=ALL")
+        popd
+    }
+}
+
+#Host consists of Runtime, Host and Host FX Resolver
+$Products = @('Microsoft .NET Core Runtime -*',
+              'Microsoft .NET Core Host -*',
+              'Microsoft .NET Core Host FX Resolver -*',
+              'Microsoft .NET Core SDK*',
+              'Microsoft ASP.NET Core*')
+
+if ($RemoveAll.IsPresent) {
+    $Keep = 0
+} else {
+    $Keep = 1
+}
+
+$Products | ForEach-Object {
+    $Product = $_
+    #Get all installed apps from Registry matching our product
+    $DotNetCoreProduct = Get-ItemProperty 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*'  |
+            Where-Object {$_.displayname -like $Product} |
+            Select-Object DisplayName, DisplayVersion, UninstallString
+
+    #Keep latest
+    $DotNetCoreProduct | Sort-Object { [System.Version]::new($_.DisplayVersion)} -Descending |
+        Select-Object -First $Keep | ForEach-Object {
+            Write-Host "Keeping $($_.DisplayName) version $($_.DisplayVersion)" -ForegroundColor Cyan
+        }
+
+    #Convert WMI version to System.version, sort decending, skip latest, and remove
+    $DotNetCoreProduct | Sort-Object { [System.Version]::new($_.DisplayVersion)} -Descending |
+        Select-Object -Skip $Keep |
+            ForEach-Object {
+                $IdentifyingNumber = "{  $($_.UninstallString.split("{")[1].split("}")[0])}"
+                $DisplayName = $_.DisplayName
+                Write-Host "*** Removing  $($_.DisplayName) version $($_.DisplayVersion) Uninstall: $($_.UninstallString)" -ForegroundColor Red
+                Remove-DotNetCore -GUID $IdentifyingNumber
+
+                #Now check if there's the same DisplayName  in 'HKLM:\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*'
+                $WOWProduct = Get-ItemProperty 'HKLM:\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*'  |
+                    Where-Object {$_.displayname -like $DisplayName} |
+                    Select-Object DisplayName, DisplayVersion, UninstallString
+                 $IdentifyingNumber = "{$($WOWProduct.UninstallString.split("{")[1].split("}")[0])}"
+                Remove-DotNetCore -GUID $IdentifyingNumber
+            }
+}

RemoveCoreSDKs.ps1

@@ -1,11 +1,37 @@
-$app = Get-WmiObject -Class Win32_Product | Where-Object { 
-    $_.Name -match "Microsoft .NET Core SDK" 
+#Requires -Version 3.0
+#Requires -RunAsAdministrator
+[CmdletBinding(SupportsShouldProcess=$true)]
+Param ()
+
+#Function to remove a single version of dotnetCore - supports -whatif
+Function Remove-DotNetCore {
+    [CmdletBinding(SupportsShouldProcess=$true)]
+    param ([string] $GUID )
+
+    if ($PSCmdlet.ShouldProcess($GUID)) {
+        pushd $env:SYSTEMROOT\System32
+        Start-Process msiexec -wait -ArgumentList ("/x $GUID /qn IGNOREDEPENDENCIES=ALL")
+        popd
+    }
 }
 
-Write-Host $app.Name 
-Write-Host $app.IdentifyingNumber
-pushd $env:SYSTEMROOT\System32
+#Get all installed apps from Registry matching .Net Core SDK
+$DotNetCoreSDKInstalls = Get-ItemProperty 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*'  | 
+         Where-Object {$_.displayname -match 'Microsoft .NET Core SDK'} | 
+         Select-Object DisplayName, DisplayVersion, UninstallString 
+
 
-$app.identifyingnumber |% { Start-Process msiexec -wait -ArgumentList "/x $_" }
+#Keep latest
+$DotNetCoreSDKInstalls | Sort-Object { [System.Version]::new($_.DisplayVersion)} -Descending | 
+    Select-Object -First  1 | ForEach-Object { 
+        Write-Host ("Keeping " + $_.DisplayName + " version " + $_.DisplayVersion)
+    }
 
-popd
+#Convert WMI version to System.version, sort decending, skip latest 
+$DotNetCoreSDKInstalls | Sort-Object { [System.Version]::new($_.DisplayVersion)} -Descending | 
+    Select-Object -Skip 1 | 
+        ForEach-Object { 
+            $IdentifyingNumber = "{" + $_.UninstallString.split("{")[1]
+            Write-Host ("*** Removing  " + $_.DisplayName + " version " + $_.DisplayVersion + " Uninstall: " + $_.UninstallString)
+            Remove-DotNetCore -GUID $IdentifyingNumber
+        }