将哈希表转换为 json 后，Powershell 缺少数组

使用图形API和Intune.我在脚本中创建哈希表，并将其转换为JSON，并将其发布到GraphAPI.

转换正确时的情况:

$TargetGroupIDs = @('111', '222')
$AppAssignment = @{
  mobileAppAssignments = @{
  }
}

$AppAssignment.mobileAppAssignments = foreach ($GroupID in $TargetGroupIDs) {
  $Hash = [ordered]@{
    "@odata.type" = "#microsoft.graph.mobileAppAssignment"
    intent        = "Required"
    settings      = $null
    target        = @{
      "@odata.type" = "#microsoft.graph.groupAssignmentTarget"
      groupId       = "$GroupID"
    }
  }
  write-output (New-Object -Typename PSObject -Property $hash)
}

$AppAssignment | ConvertTo-Json -Depth 50

输出:

{
  "mobileAppAssignments": [
    {
      "@odata.type": "#microsoft.graph.mobileAppAssignment",
      "intent": "Required",
      "settings": null,
      "target": {
        "groupId": "111",
        "@odata.type": "#microsoft.graph.groupAssignmentTarget"
      }
    },
    {
      "@odata.type": "#microsoft.graph.mobileAppAssignment",
      "intent": "Required",
      "settings": null,
      "target": {
        "groupId": "222",
        "@odata.type": "#microsoft.graph.groupAssignmentTarget"
      }
    }
  ]
}

但当我在$TargetGroupIDs中有一个元素时，转换是不正确的:

$TargetGroupIDs = @('111')
$AppAssignment = @{
  mobileAppAssignments = @{
  }
}

$AppAssignment.mobileAppAssignments = foreach ($GroupID in $TargetGroupIDs) {
  $Hash = [ordered]@{
    "@odata.type" = "#microsoft.graph.mobileAppAssignment"
    intent        = "Required"
    settings      = $null
    target        = @{
      "@odata.type" = "#microsoft.graph.groupAssignmentTarget"
      groupId       = "$GroupID"
    }
  }
  write-output (New-Object -Typename PSObject -Property $hash)
}

$AppAssignment | ConvertTo-Json -Depth 50

输出:

{
  "mobileAppAssignments": {
    "@odata.type": "#microsoft.graph.mobileAppAssignment",
    "intent": "Required",
    "settings": null,
    "target": {
      "groupId": "111",
      "@odata.type": "#microsoft.graph.groupAssignmentTarget"
    }
  }
}

请注意mobileAppAssignments后括号中的差异.在第一种情况下[]，但在第二种情况下{}.

有人能告诉我在第二种情况下遗漏了什么吗？