Value cannot be null. (Parameter 'stream')

[domleg]

Expected Behavior

That the RemoteDesktop Connect method works without errors.

Current Behavior

When using VNCSharp this method was working fine but the performance was very bad. I upgraded my project to .NET Core 8.0 and used VNCSharpCore instead.

// Create a new RemoteDesktop control
RemoteDesktop newRd = new RemoteDesktop();
vncPanel.Controls.Add(newRd); // Add the new control to the panel
newRd.Dock = DockStyle.Fill;

try
{
// Connect
newRd.Connect(ipAddress, true, true); // Adjust parameters as needed
// Optionally, handle disconnections or other events here
newRd.ConnectionLost += (sender, e) =>
{
MessageBox.Show("Connection lost.");
};
}
catch (Exception ex)
{
MessageBox.Show($"Failed to connect: {ex.Message}"); //fails here with the error in the title.
}

Possible Solution

I need to know what this Parameter 'stream' is so I can fix it.

Steps to Reproduce (for bugs)

Not sure as it's specific to our environment.

Context

Trying to make a grid of all our Linux devices where all VNC Clients are visible in the grid in real time over a local network at 1 Gbps.

Your Environment

VNC Servers are running on Linux, client can simply connect with IP address.

[imoore937]

I have the same error trying to use this in a VB app. I also have upgraded to .NET 8.0 and VNCSharpCore instead of the unmaintained VNCSharp. I just have one RemoteDesktop control on a form.
Here's the code I use to connect to the server:

    Public Sub Connect()
        Dim vncex As VncProtocolException
        Dim oex As Exception
        ' As long as they didn't click Cancel, try to connect
        If (Not PiHost = Nothing) Then
            Me.Instance.Invoke(Sub()
                                   Try
                                       RemoteDesktop1.GetPassword = New VncSharpCore.AuthenticateDelegate(AddressOf GetPassword)
                                       Me.RemoteDesktop1.Connect(PiHost)
                                       BackgroundWorker1.WorkerReportsProgress = True
                                       BackgroundWorker1.ReportProgress(100)
                                   Catch vncex
                                       If vncex.HResult = "-2146232832" Then
                                           'VNC not running yet, so try sleeping for a bit
                                       Else
                                           MsgBox("Error " & vncex.HResult & ": " & vncex.Message)
                                       End If

                                       Exit Try
                                   Catch oex
                                       MsgBox(oex.Message)
                                   End Try
                               End Sub)
        End If
    End Sub

Once I click OK to the "Value cannot be null" error, VS gives an error:
System.NullReferenceException: 'Object reference not set to an instance of an object.'

at the last line in this part of the VNCSharp code:

public override Rectangle GetMouseMoveRectangle()
{
	Rectangle rectangle = vnc.Framebuffer.Rectangle;
	if (remoteDesktop.ClientSize.Width > remoteDesktop.Desktop.Size.Width)
	{
		rectangle.X = (remoteDesktop.ClientRectangle.Width - remoteDesktop.Desktop.Width) / 2;