WinForms: implementing ContextMenuStrip Not Displaying Correctly on Multi-Monitor Setup
Could someone explain I'm stuck trying to I'm working with a perplexing scenario with a `ContextMenuStrip` in my WinForms application that seems to behave inconsistently across different monitors in a multi-monitor setup. My application is built with .NET Framework 4.8 and utilizes Windows Forms for the UI. When right-clicking on a control to show the `ContextMenuStrip`, it appears at the wrong position—often offset from the cursor location or sometimes entirely outside the bounds of the screen on which the application is running. I've tried explicitly setting the `Location` of the `ContextMenuStrip` just before showing it, like this: ```csharp private void MyControl_MouseDown(object sender, MouseEventArgs e) { if (e.Button == MouseButtons.Right) { contextMenuStrip1.Show(MyControl, e.Location); } } ``` However, this doesn't resolve the scenario, especially when the application is moved between monitors with different DPI settings. When I debug the application, I see that `e.Location` returns the correct coordinates relative to `MyControl`, but the context menu still does not appear in the expected location. Additionally, I've tried using `PointToScreen` to translate the coordinates: ```csharp private void MyControl_MouseDown(object sender, MouseEventArgs e) { if (e.Button == MouseButtons.Right) { var screenPoint = MyControl.PointToScreen(e.Location); contextMenuStrip1.Show(screenPoint); } } ``` This approach also failed, especially when running on a machine with a dual-monitor setup where the primary monitor is at 100% scaling and the secondary is at 125%. I also checked the `AutoScaleMode` property of the form, and it's set to `Dpi`. Interestingly, I've noticed that if I run the application with a single monitor or if I change the DPI settings to be the same on both monitors, the context menu displays correctly. But the moment I return to the multi-monitor setup with mixed DPI, the scenario resurfaces. Has anyone faced a similar question or found a workaround for properly displaying context menus in a multi-monitor environment with different scaling settings? I'd love to hear your thoughts on this. I'm working with C# in a Docker container on Ubuntu 20.04. I'd love to hear your thoughts on this.