For some reason ConvertTo-Json messes up within a function - what am I missing? Note-Now fixed, this isn't c#, see commits to see fix. (https://gist.github.com/matt40k/fab6ca579c355a0862a0a2ffb8166330/revisions)

ConvertToJsonFunctionBug.ps1

$v1
$v2

Function GetJson($value1, $value2)
{
    $j = @{"test"=$value1;"test2"=$value2} | ConvertTo-Json
    return $j
}

$v1 = "test123"
$v2 = "test321"

$result = GetJson $v1 $v2
Write-Host $result
#Returns (incorrect)
#{
#    "test":  [
#                 "test123",
#                 "test321"
#             ],
#    "test2":  null
#}

$value1=$v1
$value2=$v2

$j2 = @{"test"=$value1;"test2"=$value2} | ConvertTo-Json
Write-Host $j2
#Returns (correct)
#{
#    "test":  "test123",
#    "test2":  "test321"
#}