Merge two .json objects using PowerShell

Merge-Json.ps1

function Join-Objects($source, $extend){
    if($source.GetType().Name -eq "PSCustomObject" -and $extend.GetType().Name -eq "PSCustomObject"){
        foreach($Property in $source | Get-Member -type NoteProperty, Property){
            if($extend.$($Property.Name) -eq $null){
              continue;
            }
            $source.$($Property.Name) = Join-Objects $source.$($Property.Name) $extend.$($Property.Name)
        }
    }else{
       $source = $extend;
    }
    return $source
}
function AddPropertyRecurse($source, $toExtend){
    if($source.GetType().Name -eq "PSCustomObject"){
        foreach($Property in $source | Get-Member -type NoteProperty, Property){
            if($toExtend.$($Property.Name) -eq $null){
              $toExtend | Add-Member -MemberType NoteProperty -Value $source.$($Property.Name) -Name $Property.Name `
            }
            else{
               $toExtend.$($Property.Name) = AddPropertyRecurse $source.$($Property.Name) $toExtend.$($Property.Name)
            }
        }
    }
    return $toExtend
}
function Json-Merge($source, $extend){
    $merged = Join-Objects $source $extend
    $extended = AddPropertyRecurse $source $merged
}

#read json files into PSCustomObjects like this:
#$1 = Get-Content 'C:\Beijer\smith-env-settings\1.json' -Raw | ConvertFrom-Json
#$2 = Get-Content 'C:\Beijer\smith-env-settings\2.json'-Raw | ConvertFrom-Json
#Merge properties of the first one and second one.
#$3 = Json-Merge $1 $2

This works in the following way:

1. For all properties that exist both in the first object and in the second one override override the properties' values of the first object with the values of the second one.
2. Add properties from which are unique for the second object to the first object
   That's it.

I believe there is an issue with Json-Merge, I found I had to tweak it like this to get it to work:

function Json-Merge($source, $extend){
$merged = Join-Objects $source $extend
$extended = AddPropertyRecurse $merged $extend
return $extended
}

There is such functionality already:
$extended = @($source; $extend) | ConvertTo-Json -Depth 100

Thank you Badabum, this works great for me! The one-liner provided by DenisIusupov-Parsable gives me a different result which is not what I'm after in this case, so visitors should try them both to see which solution works better in their special case.