From 1c433d519d8c4d7e4360beeb551854de4add48ec Mon Sep 17 00:00:00 2001
From: Jonas Arnold <jonas.arnold@live.de>
Date: Thu, 30 Mar 2023 07:46:55 +0200
Subject: [PATCH] small corrections on UsbHidTestApp

---
 UsbHidTestApp/Program.cs | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/UsbHidTestApp/Program.cs b/UsbHidTestApp/Program.cs
index 6e222d0..412d6f1 100644
--- a/UsbHidTestApp/Program.cs
+++ b/UsbHidTestApp/Program.cs
@@ -7,10 +7,10 @@ namespace UsbHidTestApp;
 
 internal class Program
 {
-    private static HidDevice _device;
+    private static HidDevice? _device;
     private static bool _continue;
-    private static Thread readThread;
-    private static List<HidDevice> lastDevices;
+    private static Thread? readThread;
+    private static List<HidDevice>? lastDevices;
     private static StringComparer stringComparer = StringComparer.OrdinalIgnoreCase;
 
 
@@ -89,6 +89,7 @@ internal class Program
 
                     _device.OpenDevice();
 
+
                     _device.Inserted += DeviceAttachedHandler;
                     _device.Removed += DeviceRemovedHandler;
 
@@ -151,7 +152,7 @@ internal class Program
     private static void DeviceAttachedHandler()
     {
         Console.WriteLine("Device attached.");
-        _device.ReadReport(OnReport);
+        _device?.ReadReport(OnReport);
     }
 
     private static void OnReport(HidReport report)
@@ -171,7 +172,7 @@ internal class Program
         {
             try
             {
-                var readData = _device.Read(100);
+                var readData = _device?.Read(100);
 
                 if (readData != null)
                 {