diff --git a/RetroSpyX/ConfigParseException.cs b/RetroSpyX/ConfigParseException.cs
index adb00c9a..351744a7 100644
--- a/RetroSpyX/ConfigParseException.cs
+++ b/RetroSpyX/ConfigParseException.cs
@@ -20,8 +20,5 @@ public ConfigParseException(string message, Exception innerException)
 
         public ConfigParseException(string format, Exception innerException, params object[] args)
             : base(string.Format(CultureInfo.CurrentCulture, format, args), innerException) { }
-
-        protected ConfigParseException(System.Runtime.Serialization.SerializationInfo serializationInfo, System.Runtime.Serialization.StreamingContext streamingContext)
-            : base(serializationInfo, streamingContext) { }
     }
 }
\ No newline at end of file
diff --git a/RetroSpyX/SSHMonitorDisconnectException.cs b/RetroSpyX/SSHMonitorDisconnectException.cs
index e67bc171..e1f8d81f 100644
--- a/RetroSpyX/SSHMonitorDisconnectException.cs
+++ b/RetroSpyX/SSHMonitorDisconnectException.cs
@@ -16,9 +16,5 @@ public SSHMonitorDisconnectException(string message, Exception innerException) :
         public SSHMonitorDisconnectException()
         {
         }
-
-        protected SSHMonitorDisconnectException(System.Runtime.Serialization.SerializationInfo serializationInfo, System.Runtime.Serialization.StreamingContext streamingContext) : base(serializationInfo, streamingContext)
-        {
-        }
     }
 }
diff --git a/RetroSpyX/SetupWindow.axaml.cs b/RetroSpyX/SetupWindow.axaml.cs
index 5af64fbc..89050b1c 100644
--- a/RetroSpyX/SetupWindow.axaml.cs
+++ b/RetroSpyX/SetupWindow.axaml.cs
@@ -1051,7 +1051,7 @@ private void MiSTerPopulate_Click(object sender, RoutedEventArgs e)
                 {
                     while (!_data.DataAvailable) { }
 
-                    string line = _data.ReadLine();
+                    string line = _data.ReadLine()!;
                     if (line.Contains("retrospy_end"))
                     {
                         break;
diff --git a/firmware/sketches/Dreamcast.cpp b/firmware/sketches/Dreamcast.cpp
index a74f4215..910423e6 100644
--- a/firmware/sketches/Dreamcast.cpp
+++ b/firmware/sketches/Dreamcast.cpp
@@ -527,10 +527,6 @@ void DreamcastSpy::setup() {
 void DreamcastSpy::loop() {
 }
 
-void DreamcastSpy::loop1() {
-}
-
-
 void DreamcastSpy::writeSerial() {
 }