CommonOpenFileDialog cause Windows Form to shrink

Question

I've been working on a Windows Forms application, and have recently added a simple settings page that allows the user to select a folder for where the output goes. The OpenFileDialog is ugly and not nice to use, so I've added in the Windows API CodePack to get access to the CommonOpenFileDialog- all good there.

When I open the CommonOpenFileDialog, the Windows form application shrinks to a smaller size, as shown in the image attached.

On the left is the program normally, on the right is with the dialog open:

I've tried checking the size of the Form before and after, that's not changing, so I'm hitting a bit of a brick wall. Any information would be useful, I can provide more details if needed.

Code to open the form is:

CommonOpenFileDialog dialog = new CommonOpenFileDialog();
dialog.DefaultDirectory = selectedFolderTextBox.Text;
dialog.IsFolderPicker = true;

if (dialog.ShowDialog() != CommonFileDialogResult.Ok) return;

selectedFolderTextBox.Text = dialog.FileName;

Answer 1

Enable dpi-aware by adding app.manifest file, and uncomment this blocks.

<application xmlns="urn:schemas-microsoft-com:asm.v3">
    <windowsSettings>
    <dpiAware xmlns="http://schemas.microsoft.com/SMI/2005/WindowsSettings">true</dpiAware>
    </windowsSettings>
</application>

This works for me on my Surface Pro 4(dpi scale 200%).