https://learn.microsoft.com/en-us/dotnet/api/system.windows.forms.control.suspendlayout?view=netframework-4.8.1&tree=cete.dynamicpdf.viewer.pdfnavigationpanel.suspendlayout
Control.SuspendLayout Method (System.Windows.Forms) | Microsoft Learn
Temporarily suspends the layout logic for the control.
windows formscontrolmethodsystemmicrosoft