diff --git a/Tidstagning/AboutBox.cs b/Tidstagning/AboutBox.cs
index a004065..61ec8c4 100644
--- a/Tidstagning/AboutBox.cs
+++ b/Tidstagning/AboutBox.cs
@@ -32,7 +32,7 @@ namespace Tidstagning
                         return titleAttribute.Title;
                     }
                 }
-                return System.IO.Path.GetFileNameWithoutExtension(Assembly.GetExecutingAssembly().CodeBase);
+                return System.IO.Path.GetFileNameWithoutExtension(Assembly.GetExecutingAssembly().Location);
             }
         }
 
diff --git a/Tidstagning/MainUI.cs b/Tidstagning/MainUI.cs
index 1e961b5..15a5e29 100644
--- a/Tidstagning/MainUI.cs
+++ b/Tidstagning/MainUI.cs
@@ -11,8 +11,8 @@ namespace Tidstagning
         {
 
         };
-        ResultList liste;
-        Relay horn;
+        ResultList? liste;
+        Relay? horn;
         Procedure startprocedure = new Procedure();
 
         public MainUI()
diff --git a/Tidstagning/Procedure.cs b/Tidstagning/Procedure.cs
index b922578..63de7ec 100644
--- a/Tidstagning/Procedure.cs
+++ b/Tidstagning/Procedure.cs
@@ -1,15 +1,17 @@
-using System.Diagnostics;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
 
 namespace Tidstagning
 {
     class Procedure
     {
-        Relay horn;
-        ResultList log;
+        Relay? horn;
+        ResultList? log;
         List<DateTime> signaler;
         uint signalLength = 500;
 
-        System.Threading.Timer timer;
+        System.Threading.Timer? timer;
         Int16 idx = 0;
 
         public Procedure()
diff --git a/Tidstagning/Relay.cs b/Tidstagning/Relay.cs
index 4486012..b6352c6 100644
--- a/Tidstagning/Relay.cs
+++ b/Tidstagning/Relay.cs
@@ -3,12 +3,13 @@ using System.Collections.Generic;
 using System.Diagnostics;
 using System.IO.Ports;
 using System.Threading;
+
 namespace Tidstagning
 {
     class Relay
     {
         SerialPort com;
-        System.Threading.Timer cooldownTimer;
+        System.Threading.Timer? cooldownTimer;
 
         struct SignalSpec
         {
diff --git a/Tidstagning/ResultList.cs b/Tidstagning/ResultList.cs
index 4f0dc6a..7299eaa 100644
--- a/Tidstagning/ResultList.cs
+++ b/Tidstagning/ResultList.cs
@@ -8,7 +8,7 @@ namespace Tidstagning
         System.IO.StreamWriter filehandle;
         System.IO.StreamWriter filehandle2;
         Tidstagning.MainUI parentForm;
-        string racenumber;
+        string racenumber = "";
         public ResultList(string filename, Tidstagning.MainUI log_object)
         {
             filename = MakeSafeFilename(filename, '_');
diff --git a/Tidstagning/Tidstagning.csproj b/Tidstagning/Tidstagning.csproj
index 335db81..5986309 100644
--- a/Tidstagning/Tidstagning.csproj
+++ b/Tidstagning/Tidstagning.csproj
@@ -4,9 +4,22 @@
     <OutputType>WinExe</OutputType>
     <TargetFramework>net6.0-windows</TargetFramework>
     <Nullable>enable</Nullable>
-    <UseWindowsForms>true</UseWindowsForms>
-    <ImplicitUsings>enable</ImplicitUsings>
+    <UseWindowsForms>True</UseWindowsForms>
+    <ImplicitUsings>disable</ImplicitUsings>
     <StartupObject>Tidstagning.Program</StartupObject>
+    <DebugType>portable</DebugType>
+    <SignAssembly>False</SignAssembly>
+    <ErrorReport>none</ErrorReport>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
+    <NoWarn />
+    <CheckForOverflowUnderflow>True</CheckForOverflowUnderflow>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|AnyCPU'">
+    <NoWarn />
+    <CheckForOverflowUnderflow>True</CheckForOverflowUnderflow>
   </PropertyGroup>
 
   <ItemGroup>