diff --git a/Nefarius.Peripherals.SerialPort/NativeMethods.txt b/Nefarius.Peripherals.SerialPort/NativeMethods.txt
index 88e99b5..48e53bd 100644
--- a/Nefarius.Peripherals.SerialPort/NativeMethods.txt
+++ b/Nefarius.Peripherals.SerialPort/NativeMethods.txt
@@ -5,7 +5,6 @@ FILE_ACCESS_RIGHTS
 GetCommModemStatus
 GetCommProperties
 GetHandleInformation
-GetHandleInformation
 GetOverlappedResult
 MODEM_STATUS_FLAGS
 ReadFile
diff --git a/Nefarius.Peripherals.SerialPort/QueueStatus.cs b/Nefarius.Peripherals.SerialPort/QueueStatus.cs
index 63469fd..661b5dc 100644
--- a/Nefarius.Peripherals.SerialPort/QueueStatus.cs
+++ b/Nefarius.Peripherals.SerialPort/QueueStatus.cs
@@ -1,5 +1,5 @@
 using System.Text;
-using Nefarius.Peripherals.SerialPort.Win32PInvoke;
+
 
 namespace Nefarius.Peripherals.SerialPort
 {
diff --git a/Nefarius.Peripherals.SerialPort/SerialPort.Properties.cs b/Nefarius.Peripherals.SerialPort/SerialPort.Properties.cs
index d44f695..55214cf 100644
--- a/Nefarius.Peripherals.SerialPort/SerialPort.Properties.cs
+++ b/Nefarius.Peripherals.SerialPort/SerialPort.Properties.cs
@@ -1,8 +1,6 @@
 using Windows.Win32;
 using Windows.Win32.Devices.Communication;
 
-using Nefarius.Peripherals.SerialPort.Win32PInvoke;
-
 namespace Nefarius.Peripherals.SerialPort;
 
 public partial class SerialPort
diff --git a/Nefarius.Peripherals.SerialPort/SerialPort.cs b/Nefarius.Peripherals.SerialPort/SerialPort.cs
index a98a6da..75114e8 100644
--- a/Nefarius.Peripherals.SerialPort/SerialPort.cs
+++ b/Nefarius.Peripherals.SerialPort/SerialPort.cs
@@ -11,8 +11,6 @@ using Windows.Win32.Storage.FileSystem;
 
 using Microsoft.Win32.SafeHandles;
 
-using Nefarius.Peripherals.SerialPort.Win32PInvoke;
-
 namespace Nefarius.Peripherals.SerialPort;
 
 /// <summary>
@@ -344,7 +342,7 @@ public partial class SerialPort : IDisposable
     public void SendImmediate(byte tosend)
     {
         CheckOnline();
-        if (!Win32Com.TransmitCommChar(_hPort.DangerousGetHandle(), tosend))
+        if (!PInvoke.TransmitCommChar(_hPort, new CHAR((sbyte)tosend)))
         {
             ThrowException("Transmission failure");
         }
@@ -357,12 +355,12 @@ public partial class SerialPort : IDisposable
     protected ModemStatus GetModemStatus()
     {
         CheckOnline();
-        if (!Win32Com.GetCommModemStatus(_hPort.DangerousGetHandle(), out uint f))
+        if (!PInvoke.GetCommModemStatus(_hPort, out MODEM_STATUS_FLAGS f))
         {
             ThrowException("Unexpected failure");
         }
 
-        return new ModemStatus((MODEM_STATUS_FLAGS)f);
+        return new ModemStatus(f);
     }
 
     /// <summary>
@@ -591,12 +589,12 @@ public partial class SerialPort : IDisposable
 
                 if (i != 0)
                 {
-                    if (!Win32Com.GetCommModemStatus(_hPort.DangerousGetHandle(), out uint f))
+                    if (!PInvoke.GetCommModemStatus(_hPort, out MODEM_STATUS_FLAGS f))
                     {
                         throw new CommPortException("IO Error [005]");
                     }
 
-                    OnStatusChange(new ModemStatus(i), new ModemStatus((MODEM_STATUS_FLAGS)f));
+                    OnStatusChange(new ModemStatus(i), new ModemStatus(f));
                 }
             }
         }
@@ -620,7 +618,7 @@ public partial class SerialPort : IDisposable
 
         if (_online)
         {
-            if (Win32Com.GetHandleInformation(_hPort.DangerousGetHandle(), out uint _))
+            if (PInvoke.GetHandleInformation(_hPort, out uint _))
             {
                 return true;
             }
diff --git a/Nefarius.Peripherals.SerialPort/Win32PInvoke/Win32Com.cs b/Nefarius.Peripherals.SerialPort/Win32PInvoke/Win32Com.cs
deleted file mode 100644
index 5603c89..0000000
--- a/Nefarius.Peripherals.SerialPort/Win32PInvoke/Win32Com.cs
+++ /dev/null
@@ -1,17 +0,0 @@
-using System;
-using System.Runtime.InteropServices;
-
-namespace Nefarius.Peripherals.SerialPort.Win32PInvoke;
-
-[Obsolete("use CsWin32 instead.")]
-internal class Win32Com
-{
-    [DllImport("kernel32.dll")]
-    internal static extern Boolean GetHandleInformation(IntPtr hObject, out UInt32 lpdwFlags);
-    
-    [DllImport("kernel32.dll")]
-    internal static extern Boolean TransmitCommChar(IntPtr hFile, Byte cChar);
-
-    [DllImport("kernel32.dll")]
-    internal static extern Boolean GetCommModemStatus(IntPtr hFile, out UInt32 lpModemStat);
-}
\ No newline at end of file