Run the CEF message loop. Use this function instead of an application-
provided message loop to get the best balance between performance and CPU
usage. This function should only be called on the main application thread and
only if Cef.Initialize() is called with a
CefSettings.MultiThreadedMessageLoop value of false. This function will
block until a quit message is received by the system.
CefSharp.Core (in CefSharp.Core.dll) Version: 18.104.22.168
public static void RunMessageLoop()