c # - API Microsoft Graph - Vérifier si le dossier existe

J'utilise l'API Microsoft Graph et je crée un dossier comme ceci: var driveItem = new DriveItem { Name = Customer_Name.Text + Customer_LName.Text, Folder = new Folder { }, AdditionalData = new Dictionary<string, object>() { {"@microsoft.graph.conflictBehavior","rename"} } }; var newFolder =...