https://learn.microsoft.com/en-us/dotnet/api/system.windows.input.applicationcommands.open?view=netframework-4.8.1&viewFallbackFrom=windowsdesktop-10.0
ApplicationCommands.Open Property (System.Windows.Input) | Microsoft Learn
Gets the value that represents the Open command.
property systemopenwindowsinputmicrosoft
https://learn.microsoft.com/ja-jp/dotnet/api/system.windows.input.applicationcommands?view=netframework-4.8
ApplicationCommands Class (System.Windows.Input) | Microsoft Learn
Provides a standard set of application related commands.
class systemwindowsinputmicrosoftlearn