Cannot insert variable into path for Get-Item - powershell

Question

I am trying to take a list of strings separated by a return and split them by the = symbol, both sides match a registry key which is queried by Get-Item. The first half always matches fine, but referencing the second half only matches for the last item in the list:
First half example:
[string[]]$Patch = (".accda=Access.ACCDAExtension.16
.accdb=Access.Application.16" -split "`n")
Foreach ($a in $Patch) {
$RegKey = ($a -split "=")[0]
$Result = Get-Item -Path "Registry::HKEY_CLASSES_ROOT\$RegKey"
echo $Result
}
This returns:
Name Property
---- --------
.accda (default) : Access.ACCDAExtension.16
Content Type : application/msaccess.addin
.accdb (default) : Access.Application.16
Content Type : application/msaccess
Second half example:
[string[]]$Patch = ("
.accda=Access.ACCDAExtension.16
.accdb=Access.Application.16
" -split "`n")
Foreach ($a in $Patch) {
$RegKey = ($a -split "=")[1]
$Result = Get-Item -Path "Registry::HKEY_CLASSES_ROOT\$RegKey"
}
This returns:
Get-Item : Cannot find path 'HKEY_CLASSES_ROOT\Access.ACCDAExtension.16' because it does not exist.
At line:6 char:15
+ $Result = Get-Item -Path "Registry::HKEY_CLASSES_ROOT\$RegKey"
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : ObjectNotFound: (HKEY_CLASSES_RO...DAExtension.16:String) [Get-Item], ItemNotFoundException
+ FullyQualifiedErrorId : PathNotFound,Microsoft.PowerShell.Commands.GetItemCommand
Hive: HKEY_CLASSES_ROOT
Name Property
---- --------
Access.Application.16 (default) : Microsoft Access Database
However, that registry key does exist and if I run the command manually it finds it:
get-item Registry::HKEY_CLASSES_ROOT\Access.ACCDAExtension.16
Hive: HKEY_CLASSES_ROOT
Name Property
---- --------
Access.ACCDAExtension.16 (default) : Microsoft Access Add-in
I'm pretty sure it's caused by the return at the end of each line.
PowerShell version 5.1

Answer 1

I have resolved this my making my list a list of strings:
[string[]]$Patch = (".accda=Access.ACCDAExtension.16",
".accdb=Access.Application.16" -split "`n")
Foreach ($a in $Patch) {
$RegKey = ($a -split "=")[1]
$Result = Get-Item -Path "Registry::HKEY_CLASSES_ROOT\$RegKey"
}
The issue was probably caused by the return at the end of each line, maybe I could have also filtered it out of the command.

Answer 2

Change this:
[string[]]$Patch = ("
.accda=Access.ACCDAExtension.16
.accdb=Access.Application.16
" -split "`n")
to this
[string[]]$Patch = (-split "
.accda=Access.ACCDAExtension.16
.accdb=Access.Application.16
")
That way you don't have any whitespaces.
Here is some more background on the split operator