کار با موجودیت شرکت

public class WorkspaceExViewModel
{
    /// <summary>
    /// workspace information
    /// </summary>
    public WorkspaceViewModel Workspace { get; set; }

    /// <summary>
    /// tax info
    /// </summary>
    public RWorkspaceTaxInfo TaxInfo { get; set; }
}

/// <summary>
/// Workspace tax info
/// </summary>
public class RWorkspaceTaxInfo
{
    /// <summary>
    /// Id
    /// </summary>
    public Guid Id { get; set; }

    /// <summary>
    /// Workspace Id
    /// </summary>
    public Guid WorkspaceId { get; set; }

    /// <summary>
    /// Workspace
    /// </summary>
    public RWorkspace Workspace { get; set; }

    /// <summary>
    /// brand name (نام متداول برند)
    /// </summary>
    public string BrandName { get; set; }

    /// <summary>
    /// Official Name (نام ثبت شدهٔ قانونی)
    /// </summary>
    public string OfficialName { get; set; }

    /// <summary>
    /// National Id (شناسهٔ ملی)
    /// </summary>
    public string NationalId { get; set; }

    /// <summary>
    /// Tax Payer Identification Number (کد اقتصادی)
    /// </summary>
    public string EconomicCode { get; set; }

    /// <summary>
    /// کد شعبهٔ فروشنده
    /// </summary>
    public string BranchCode { get; set; }

    /// <summary>
    /// logo image id
    /// </summary>
    public Guid? LogoImageId { get; set; }

    /// <summary>
    /// logo image
    /// </summary>
    public virtual RImage LogoImage { get; set; }

    /// <summary>
    /// tax memory id
    /// </summary>
    public string TaxMemoryId { get; set; }

    /// <summary>
    /// private key
    /// </summary>
    public string TaxPrivateKey { get; set; }

    /// <summary>
    /// Governmental / Non-Governmental
    /// </summary>
    public string OrganizationType { get; set; } = "Non-Governmental";

    /// <summary>
    /// Subunit 1 in Persian
    /// </summary>
    public string OrganizationUnitLevel1 { get; set; } = "";

    /// <summary>
    /// Subunit 2  in Persian
    /// </summary>
    public string OrganizationUnitLevel2 { get; set; } = "";

    /// <summary>
    /// Subunit 3  in Persian
    /// </summary>
    public string OrganizationUnitLevel3 { get; set; } = "";

    /// <summary>
    /// Organization Unit [Stamp] in English
    /// </summary>
    /// <smaple>
    /// pardazeshmoviazisaman
    /// </smaple>
    public string OrganizationUnitOrNameFamilyInEnglish { get; set; } = "";

    /// <summary>
    /// Email
    /// </summary>
    /// <sample>
    /// info@sppc.co.ir
    /// </sample>
    public string Email { get; set; } = "";

    /// <summary>
    /// csr first name
    /// </summary>
    public string FirstName { get; set; }

    /// <summary>
    /// SurName in Persian
    /// </summary>
    /// <sample>
    /// حسن
    /// </sample>
    public string Surname { get; set; } = "";

    /// <summary>
    /// First Name in Persian
    /// </summary>
    /// <sample>
    /// حسینی
    /// </sample>
    public string GivenName { get; set; } = "";

    /// <summary>
    /// Provice in Persian
    /// </summary>
    /// <sample>
    /// مرکزی
    /// </sample>
    public string Province { get; set; } = "";

    /// <summary>
    /// City in Persian
    /// </summary>
    /// <sample>
    /// اراک
    /// </sample>
    public string City { get; set; } = "";

    /// <summary>
    /// Role
    /// </summary>
    /// <sample>
    /// مدیر عامل
    /// </sample>
    public string Role { get; set; } = "";

    /// <summary>
    /// نشانی
    /// </summary>
    public string Address { get; set; }

    /// <summary>
    /// کد پستی
    /// </summary>
    public string PostalCode { get; set; }

    /// <summary>
    /// شماره تلفن
    /// </summary>
    public string PhoneNumber { get; set; }

    /// <summary>
    /// نمابر
    /// </summary>
    public string FaxNumber { get; set; }

    /// <summary>
    /// متن عمومی قابل استفاده در فاکتور شماره ۱
    /// </summary>
    public string FactorsNote1 { get; set; }

    /// <summary>
    /// متن عمومی قابل استفاده در فاکتور شماره ۲
    /// </summary>
    public string FactorsNote2 { get; set; }

    /// <summary>
    /// متن عمومی قابل استفاده در فاکتور شماره ۳
    /// </summary>
    public string FactorsNote3 { get; set; }

    /// <summary>
    /// stamp image id
    /// </summary>
    public Guid? StampImageId { get; set; }

    /// <summary>
    /// stamp image
    /// </summary>
    public virtual RImage StampImage { get; set; }

    /// <summary>
    /// ارسال اطلاعات به سندباکس
    /// </summary>
    public bool SandBox { get; set; }

    /// <summary>
    /// شماره ثبت شرکت
    /// </summary>
    public string? RegistrationNumber { get; set; }

    /// <summary>
    /// کلید عمومی
    /// </summary>
    public string? TaxPublicKey { get; set; }

    /// <summary>
    /// درخواست گواهی امضا
    /// </summary>
    public string? CertificateSignReq { get; set; }

}

using (HttpClient httpClient = new HttpClient())
{
    await MoaddiyanSessionChecker.PrepareClientAsync(httpClient);
    var response = await httpClient.GetAsync
        (
        $"https://api.moaddiyan.com/api/workspace/ex?onlyActive=true&onlyOwned=false&onlyMember=false"
        );
    if (response.StatusCode != HttpStatusCode.OK)
    {
        MessageBox.Show(JsonConvert.DeserializeObject<string>(await response.Content.ReadAsStringAsync()));
        return;
    }
    response.EnsureSuccessStatusCode();
    var json = await response.Content.ReadAsStringAsync();
    var workspaces = JsonConvert.DeserializeObject<WorkspaceExViewModel[]>(json);
    if (workspaces != null)
    {
        Settings.Default.WorkspacesJson = json;
        Settings.Default.Save();
        cmbWorkspace.Items.AddRange(workspaces);
        return;
    }
}