https://learn.microsoft.com/en-us/dotnet/api/microsoft.web.webview2.core.corewebview2processinfo.associatedframeinfos?view=webview2-dotnet-1.0.2839-prerelease&viewFallbackFrom=webview2-dotnet-1.0.3650.58
CoreWebView2ProcessInfo.AssociatedFrameInfos Property (Microsoft.Web.WebView2.Core) | Microsoft...
Provides the collection of associated CoreWebView2FrameInfos which are actively running (showing UI elements) in this renderer process.
propertymicrosoftwebcore