C # - Adding a UserControl to another thread throws an exception even after a call

Question

I built a custom UserControl in winfroms and added it to Panel through an additional stream.

I know that when adding control through an additional thread, you need to call the main thread to do this. So I did .. but I still get an exception saying that "the cross-thread operation is not valid: the" pictureBoxImage "control is accessible from the stream other than the stream in which it was created."

I am stuck and do not know what causes this because I tried to debug it by setting a breakpoint on each of my UserControl user methods, but none of them threw an exception.

private void addControl(Control i_ControllToAdd, Control i_ParentControl)
    {
        if (i_ParentControl.InvokeRequired)
        {
            i_ParentControl.Invoke(new Action(() => addControl(i_ControllToAdd, i_ParentControl)));
            return;
        }

        i_ParentControl.Controls.Add(i_ControllToAdd);
    }

and this is a custom class UserControl

public partial class FBPostUserControl : UserControl
    {
        private readonly string m_UserName = string.Empty;
        private readonly Image m_UserProfileImage = null;
        private readonly DateTime? m_DatePosted = null;
        private Image m_Image = null;
        private string m_PostBody = string.Empty;

    public string UserName
    {
        get { return m_UserName; }
    }

    public DateTime? DatePosted
    {
        get { return m_DatePosted; }
    }

    public Image Image
    {
        get { return m_Image; }
        set
        {
            if (value == null)
            {
                pictureBoxImage.Visible = false;
            }
            else
            {
                pictureBoxImage.Visible = true;
                pictureBoxImage.Image = value;
                updateImageSize();
            }
        }
    }

    private void updateImageSize()
    {
        if (pictureBoxImage.Image != null)
        {
            double ratio = pictureBoxImage.Image.Width / pictureBoxImage.Image.Height;
            pictureBoxImage.Height = (int)(pictureBoxImage.Width / ratio);
            pictureBoxImage.SizeMode = PictureBoxSizeMode.Zoom;
        }
    }

    public string PostBody
    {
        get { return m_PostBody; }
        set
        {
            if (string.IsNullOrWhiteSpace(value) == false)
            {
                labelPostBody.Visible = true;
                labelPostBody.Text = value;
            }
            else
            {
                labelPostBody.Visible = false;
            }
        }
    }

    public Image UserProfileImage
    {
        get { return m_UserProfileImage; }
    }

    public FBPostUserControl(string i_Name, Image i_ProfileImage, DateTime? i_PostDate)
    {
        InitializeComponent();
        m_UserName = i_Name;
        m_UserProfileImage = i_ProfileImage;
        m_DatePosted = i_PostDate;

        refreshHeader();
    }

    private void refreshHeader()
    {
        pictureBoxUserImage.Image = m_UserProfileImage;
        labelName.Text = m_UserName;

        if (labelDate != null)
        {
            labelDate.Text = m_DatePosted.ToString();
        }
        else
        {
            labelDate.Visible = false;
        }
    }
}

Answer 1

, .

, , ControlToAdd ( ) UI ( ) Invoke.

, , , .

, , , ;

i_ParentControl.Invoke(new Action(() => addControl(new Control(), i_ParentControl)));