<PackageReference Include="System.Security.Permissions" Version="10.0.4" />

System.Security.Permissions.FileDialogPermission

Controls the ability to access files or folders through a File dialog box. This class cannot be inherited.
namespace System.Security.Permissions { public sealed class FileDialogPermission : CodeAccessPermission, IUnrestrictedPermission { public FileDialogPermissionAccess Access { get; set; } public FileDialogPermission(FileDialogPermissionAccess access); public FileDialogPermission(PermissionState state); public bool IsUnrestricted(); } }