WPF 获得触摸精度和触摸点

foreach (TabletDevice device in Tablet.TabletDevices)
{
  Console.WriteLine("触摸点数" + device.StylusDevices.Count);//触摸点数
}

        var builder = new StringBuilder();
                foreach (TabletDevice device in Tablet.TabletDevices)
                {
                    var deviceProperty = typeof(TabletDevice).GetProperty("TabletDeviceImpl",
                        BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.GetProperty);
                    var deviceImpl = deviceProperty is null ? device : deviceProperty.GetValue(device);
                    var info = deviceImpl.GetType().GetProperty("TabletSize",
                        BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.GetProperty);

                    var tabletSize = (Size) info.GetValue(deviceImpl, null);
                    if (device.Type == TabletDeviceType.Touch)
                    {
                        builder.Append(string.Format("{1}：{2} 点触摸，精度 {3}{0}", Environment.NewLine,
                            device.Name, device.StylusDevices.Count, tabletSize));
                    }
                    else
                    {
                        builder.Append(string.Format("{1}：{2} 个触笔设备，精度 {3}{0}", Environment.NewLine,
                            device.Name, device.StylusDevices.Count, tabletSize));
                    }
                }