[Solved] VB.Net Error: Cannot deserialize the current JSON object

This is my JSON string:

{"id":320,"product":{"id":132,"identifier":"M365-ExchangeOnline-Plan2","_info":{"catalog_href":"https://sandbox-na.myconnectwise.net/v4_6_release/apis/3.0//procurement/catalog/132"}},"quantity":1.00,"lessIncluded":0.00,"unitPrice":8.000000,"unitCost":6.400000,"billCustomer":"Billable","effectiveDate":"2022-03-01T00:00:00Z","taxableFlag":true,"serialNumber":"Unite Office365","invoiceDescription":"Microsoft Office 365: Exchange Online (Plan 2)\n Jennifer Shields","purchaseItemFlag":false,"specialOrderFlag":false,"agreementId":180,"description":"Microsoft Office 365: Exchange Online (Plan 2)","billedQuantity":1.00,"uom":"Each","extPrice":8.000000,"extCost":6.400000,"sequenceNumber":3.00,"margin":1.600000,"prorateCost":0.000000,"proratePrice":0.000000,"extendedProrateCost":0.000000,"extendedProratePrice":0.000000,"prorateCurrentPeriodFlag":false,"agreementStatus":"Active","invoiceGrouping":{"id":9,"name":"Microsoft-365","description":"Microsoft 365","showPriceFlag":true,"showSubItemsFlag":true,"groupParentChildAdditionsFlag":false,"_info":{"invoiceGrouping_href":"https://sandbox-na.myconnectwise.net/v4_6_release/apis/3.0//procurement/invoicegrouping/9"}},"_info":{"lastUpdated":"2022-12-04T20:41:27Z","updatedBy":"Unite"},"customFields":[{"id":12,"caption":"Internal Notes","type":"TextArea","entryMethod":"EntryField","numberOfDecimals":0},{"id":19,"caption":"Additional Customer Notes","type":"TextArea","entryMethod":"EntryField","numberOfDecimals":0}]}

I got error on this line:

Dim roots As List(Of Root) = Newtonsoft.Json.JsonConvert.DeserializeObject(Of List(Of Root))(json)

Newtonsoft.Json.JsonSerializationException: 'Cannot deserialize the current JSON object (e.g. {"name":"value"}) into type 'System.Collections.Generic.List`1[CWDash.CWDash.pagAPIReport+Root]' because the type requires a JSON array (e.g. [1,2,3]) to desterilize correctly.

To fix this error either change the JSON to a JSON array (e.g. [1,2,3]) or change the deserialized type so that it is a normal .NET type (e.g. not a primitive type like integer, not a collection type like an array or List<T>) that can be desterilized from a JSON object.

JsonObjectAttribute can also be added to the type to force it to desterilize from a JSON object. Path 'id', line 1, position 6.'

Public Class Root
    Public Property id As Integer
    Public Property name As String
    Public Property type As Type
    Public Property company As Company
    Public Property contact As Contact
    Public Property parentAgreement As ParentAgreement
    Public Property site As Site
    Public Property location As Location
    Public Property department As Department
    Public Property restrictLocationFlag As Boolean
    Public Property restrictDepartmentFlag As Boolean
    Public Property startDate As DateTime
    Public Property noEndingDateFlag As Boolean
    Public Property cancelledFlag As Boolean
    Public Property sla As Sla
    Public Property applicationUnits As String
    Public Property applicationLimit As Double
    Public Property applicationCycle As String
    Public Property applicationUnlimitedFlag As Boolean
    Public Property oneTimeFlag As Boolean
    Public Property coverAgreementTime As Boolean
    Public Property coverAgreementProduct As Boolean
    Public Property coverAgreementExpense As Boolean
    Public Property coverSalesTax As Boolean
    Public Property carryOverUnused As Boolean
    Public Property allowOverruns As Boolean
    Public Property expireWhenZero As Boolean
    Public Property chargeToFirm As Boolean
    Public Property employeeCompRate As String
    Public Property employeeCompNotExceed As String
    Public Property compHourlyRate As Double
    Public Property compLimitAmount As Double
    Public Property billingCycle As BillingCycle
    Public Property billOneTimeFlag As Boolean
    Public Property billingTerms As BillingTerms
    Public Property invoicingCycle As String
    Public Property billToCompany As BillToCompany
    Public Property billToContact As BillToContact
    Public Property billToSite As BillToSite
    Public Property billAmount As Double
    Public Property taxable As Boolean
    Public Property billStartDate As DateTime
    Public Property taxCode As TaxCode
    Public Property restrictDownPayment As Boolean
    Public Property prorateFlag As Boolean
    Public Property invoiceDescription As String
    Public Property topComment As Boolean
    Public Property bottomComment As Boolean
    Public Property billTime As String
    Public Property billExpenses As String
    Public Property billProducts As String
    Public Property billableTimeInvoice As Boolean
    Public Property billableExpenseInvoice As Boolean
    Public Property billableProductInvoice As Boolean
    Public Property currency As Currency
    Public Property autoInvoiceFlag As Boolean
    Public Property nextInvoiceDate As DateTime
    Public Property companyLocation As CompanyLocation
    Public Property agreementStatus As String
    Public Property _info As Info
    Public Property customFields As List(Of CustomField)
    Public Property customerPO As String
    Public Property opportunity As Opportunity
    Public Property invoiceTemplate As InvoiceTemplate
    Public Property product As Product
    Public Property agreementId As Integer
    Public Property invoiceGrouping As invoiceGrouping
    Public Property quantity As Integer
    Public Property unitPrice As Double
    Public Property billCustomer As String
    Public Property effectiveDate As DateTime
    Public Property billedQuantity As Integer
    Public Property extPrice As Double
    Public Property sequenceNumber As Integer
    Public Property margin As Double
End Class

what wrong?