WinForms can't load local html file

[nickwei-wj]

when I execute my app I get a white screen, the code like this

String page = string.Format(@"{0}\html-resources\html\index.html", Application.StartupPath);
chromeBrowser = new ChromiumWebBrowser(page);
this.Controls.Add(chromeBrowser); 
chromeBrowser.Dock = DockStyle.Fill;
BrowserSettings browserSettings = new BrowserSettings();
browserSettings.FileAccessFromFileUrls = CefState.Enabled;
browserSettings.UniversalAccessFromFileUrls = CefState.Enabled;
chromeBrowser.BrowserSettings = browserSettings;

when I change the local html file to url, it looks ok:
chromeBrowser = new ChromiumWebBrowser("www.github.com");

The cefSharp version is 57

[baby-Jie]

ensure set your index.html always copy to output

[aphkyle]

ensure set your index.html always copy to output

Thanks it worked