Finish adressing build warning code

WhoYouCalling.csproj

@@ -6,7 +6,7 @@
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <Platforms>AnyCPU;x64;x86</Platforms>
-    <FileVersion>1.4</FileVersion>
+    <FileVersion>1.4.1</FileVersion>
     <ApplicationManifest>WhoYouCalling\app.manifest</ApplicationManifest>
     <AssemblyName>wyc</AssemblyName>
   </PropertyGroup>

WhoYouCalling/ETW/Listener.cs

@@ -4,16 +4,26 @@ namespace WhoYouCalling.ETW
 {
     internal class Listener
     {
-        protected TraceEventSession _session;
+        protected TraceEventSession? _session;
         public string SourceName = "";
 
         public void StopSession()
         {
-            _session.Dispose();
+            if (_session != null) 
+            {
+                _session.Dispose();
+            }
         }
         public bool GetSessionStatus()
         {
-            return _session.IsActive;
+            if (_session != null)
+            {
+                return _session.IsActive;
+            }
+            else
+            {
+                return false;
+            }
         }
     }
 }

WhoYouCalling/Network/DNS/DNSResponseResult.cs

@@ -3,10 +3,10 @@ namespace WhoYouCalling.Network.DNS
 {
     public class DNSResponseResult
     {
-        public int BundledRecordTypeCode { get; set; } 
+        public int BundledRecordTypeCode { get; set; } = 0;
         public string BundledRecordTypeText { get; set; } = string.Empty;
         public string BundledDomain { get; set; } = string.Empty;
-        public List<string> IPs { get; set; }
+        public List<string> IPs { get; set; } = new List<string>();
 
         public override bool Equals(object? obj)
         {
@@ -18,7 +18,7 @@ public override bool Equals(object? obj)
                    BundledRecordTypeText == other.BundledRecordTypeText &&
                    BundledDomain == other.BundledDomain &&
                    IPs.SequenceEqual(other.IPs);
-        }
+        } 
 
         public override int GetHashCode()
         {

WhoYouCalling/Network/FPC/BasePacketCapture.cs

@@ -6,8 +6,8 @@ namespace WhoYouCalling.Network.FPC
     internal class BasePacketCapture
     {
         protected static int s_packetCounter;
-        protected CaptureFileWriterDevice _captureFileWriterDevice;
-        protected LibPcapLiveDevice _captureDevice;
+        protected CaptureFileWriterDevice? _captureFileWriterDevice;
+        protected LibPcapLiveDevice? _captureDevice;
 
         public int GetPacketCount()
         {
@@ -21,15 +21,23 @@ public void SetCaptureDevice(LibPcapLiveDevice device)
 
         public void StopCapture()
         {
-            _captureDevice.StopCapture();
-            _captureFileWriterDevice.Close();
+            if (_captureDevice != null) { 
+                _captureDevice.StopCapture();
+            }
+            if (_captureFileWriterDevice != null)
+            {
+                _captureFileWriterDevice.Close();
+            }
         }
 
         protected void device_OnPacketArrival(object sender, PacketCapture e)
         {
             s_packetCounter++;
             var rawPacket = e.GetPacket();
-            _captureFileWriterDevice.Write(rawPacket);
+            if (_captureFileWriterDevice != null)
+            { 
+                _captureFileWriterDevice.Write(rawPacket);
+            }
         }
     }
 }

WhoYouCalling/Network/FPC/LivePacketCapture.cs

@@ -9,7 +9,10 @@ internal class LivePacketCapture : BasePacketCapture
         public void StartCaptureToFile(string pcapFile)
         {
             s_packetCounter = 0;
-
+            if (_captureDevice == null)
+            {
+                return;
+            }
             // Register our handler function to the 'packet arrival' event
             _captureDevice.OnPacketArrival += new PacketArrivalEventHandler(device_OnPacketArrival);