diff --git a/CMakeLists.txt b/CMakeLists.txt
index f0f8695..e857801 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -280,7 +280,7 @@ file (GLOB libminiupnpcSrcGlob
 	${ZTO_SRC_DIR}/ext/miniupnpc/upnpreplyparse.c)
 
 if (ZTS_PINVOKE)
-	set (ZTS_SWIG_WRAPPER_FILE ${PROJ_DIR}/examples/csharp/*.cxx)
+	set (ZTS_SWIG_WRAPPER_FILE ${LIBZT_SRC_DIR}/bindings/csharp/*.cxx)
 	set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DZTS_PINVOKE=1")
 endif ()
 
@@ -544,6 +544,8 @@ if (SHOULD_BUILD_TESTS)
 	target_link_libraries(nonblockingclient ${STATIC_LIB_NAME})
 	add_executable (nonblockingserver ${PROJ_DIR}/examples/cpp/nonblockingserver.cpp)
 	target_link_libraries(nonblockingserver ${STATIC_LIB_NAME})
+	add_executable (keymanagement ${PROJ_DIR}/examples/cpp/keymanagement.cpp)
+	target_link_libraries(keymanagement ${STATIC_LIB_NAME})
 if (CENTRAL_API)
 	add_executable (centralapi ${PROJ_DIR}/examples/cpp/centralapi.cpp)
 	target_link_libraries(centralapi ${STATIC_LIB_NAME})
diff --git a/dist.ps1 b/dist.ps1
index 895155b..0982366 100644
--- a/dist.ps1
+++ b/dist.ps1
@@ -1,5 +1,46 @@
+function CreateNugetPackage
+{
+	md builds\pkg\nuget -Force
+
+	# runtimes
+	md pkg\nuget\ZeroTier.Sockets\runtimes\win10-x86\native -Force
+	md pkg\nuget\ZeroTier.Sockets\runtimes\win10-x64\native -Force
+	md pkg\nuget\ZeroTier.Sockets\runtimes\win10-x64\lib\uap10.0 -Force
+	md pkg\nuget\ZeroTier.Sockets\runtimes\win10-arm\native -Force
+
+	# frameworks
+	md pkg\nuget\ZeroTier.Sockets\lib\net48 -Force
+	md pkg\nuget\ZeroTier.Sockets\lib\net5.0 -Force
+
+	# Build native libzt with exported P/INVOKE symbols
+	Build-Library -BuildType "Release" -Arch "x64" -LanguageBinding "csharp"
+	Build-Library -BuildType "Release" -Arch "x64" -LanguageBinding ""
+
+	Build-Library -BuildType "Release" -Arch "Win32" -LanguageBinding "csharp"
+	#Build-Library -BuildType "Release" -Arch "ARM" -LanguageBinding "csharp"
+
+	# Copy assemblies into NuGet package tree
+	Copy-Item .\lib\release\win-x64-pinvoke\*.dll pkg\nuget\ZeroTier.Sockets\runtimes\win10-x64\lib\uap10.0\libzt.dll
+	Copy-Item .\lib\release\win-x64\*.dll pkg\nuget\ZeroTier.Sockets\runtimes\win10-x64\native\libzt.dll
+
+	Copy-Item .\lib\release\win-x86-pinvoke\*.dll pkg\nuget\ZeroTier.Sockets\runtimes\win10-x86\native\libzt.dll
+	#Copy-Item .\lib\release\win-arm-pinvoke\*.dll pkg\nuget\ZeroTier.Sockets\runtimes\win10-arm\native\libzt.dll
+
+	# Build wrapper library for C# ZeroTier.Sockets abstraction
+	csc -target:library -out:pkg\nuget\ZeroTier.Sockets\lib\net5.0\ZeroTier.Sockets.dll .\src\bindings\csharp\*.cs
+
+	# Package everything
+	Push-Location -Path pkg\nuget\ZeroTier.Sockets
+
+	del ZeroTier.Sockets.*.nupkg
+	nuget pack ZeroTier.Sockets.nuspec -OutputDirectory ..\..\..\builds\pkg\nuget
+
+	Pop-Location
+}
+
 function Clean
 {
+	Remove-Item builds -Recurse -Force -Confirm:$false -ErrorAction:'silentlycontinue'
 	Remove-Item tmp -Recurse -Force -Confirm:$false -ErrorAction:'silentlycontinue'
 	Remove-Item lib -Recurse -Force -Confirm:$false -ErrorAction:'silentlycontinue'
 	Remove-Item bin -Recurse -Force -Confirm:$false -ErrorAction:'silentlycontinue'
@@ -29,11 +70,11 @@ function Build-Library([string]$BuildType, [string]$Arch, [string]$LanguageBindi
 		$bitCount="64"
 		$archAlias="win-x64"
 	}
-	if ($Arch -eq "ARM32") {
-		$bitCount="32"
-		$archAlias="win-arm"
-	}
-	if ($Arch -eq "ARM64") {
+	#if ($Arch -eq "ARM32") {
+	#	$bitCount="32"
+	#	$archAlias="win-arm"
+	#}
+	if ($Arch -eq "ARM") {
 		$bitCount="64"
 		$archAlias="win-arm64"
 	}
diff --git a/examples/csharp/Makefile b/examples/csharp/Makefile
deleted file mode 100644
index ad83d2a..0000000
--- a/examples/csharp/Makefile
+++ /dev/null
@@ -1,12 +0,0 @@
-debug:
-	cd ../../ && make host_pinvoke_debug
-	cp -f ../../lib/debug/linux-x86_64/libzt.so .
-	mono-csc -out:example.exe *.cs
-
-release:
-	cd ../../ && make host_pinvoke_release
-	cp -f ../../lib/release/linux-x86_64/libzt.so .
-	mono-csc -out:example.exe *.cs
-
-clean:
-	rm -rf libzt.* example.exe
\ No newline at end of file
diff --git a/examples/csharp/README.md b/examples/csharp/README.md
index 6c8bd99..710cf5d 100644
--- a/examples/csharp/README.md
+++ b/examples/csharp/README.md
@@ -1,22 +1,28 @@
-ZeroTier Sockets for C# .NET (Work In Progress)
+ZeroTier Sockets for C# .NET
 =====
 
-This library is a re-implementation of the .NET socket class ([System.Net.Sockets.Socket](https://docs.microsoft.com/en-us/dotnet/api/system.net.sockets.socket)) built atop ZeroTier's SDK using P/INVOKE and is designed to be a direct drop-in replacement. The library consists of three main objects: `ZeroTier.Node`, `ZeroTier.Event`, and `ZeroTier.Socket`. No code change is required in your application beyond a small snippet of startup code, renaming `Socket` to `ZeroTier.Socket` (where applicable) and handling a smattering of events.
+A replacement for the [System.Net.Sockets.Socket](https://docs.microsoft.com/en-us/dotnet/api/system.net.sockets.socket) class built atop ZeroTier's SDK using P/INVOKE. It is designed to be a direct drop-in replacement. The library consists of three main objects: `ZeroTier.Node`, `ZeroTier.Event`, and `ZeroTier.Socket`. No code change is required in your application beyond a small snippet of startup code, renaming `Socket` to `ZeroTier.Socket` (where applicable) and handling a smattering of events.
 
+# Overview
 
-tl;dr:
-
+Add `ZeroTier.Sockets` to your project: 
+```powershell
+Install-Package ZeroTier.Sockets
 ```
+
+See [example.cs](./example.cs) for complete client/server app implementation.
+
+```csharp
 using System.Net.Sockets;
 using ZeroTier;
 
-void myCallback(ZeroTier.Event e)
+void OnZeroTierEvent(ZeroTier.Event e)
 {
 	Console.WriteLine("{0} ({1})", e.EventCode, e.EventName);
 }
 ...
 
-ZeroTier.Node node = new ZeroTier.Node("path", myCallback, 9991);     	
+ZeroTier.Node node = new ZeroTier.Node("path", OnZeroTierEvent, 9991);     	
 
 node.Start();	
 node.Join(0xc287ac0b42a6fb4c);
@@ -31,15 +37,28 @@ sock.Connect(remoteEndPoint);
 
 node.Stop();
 ```
-See [example.cs](./example.cs) for a complete client/server implementation.
 
-## Building and running the example
+# Building example without NuGet package (Advanced)
+
+From top-level repo directory, build `libzt.dll/so/dylib`:
+
+```bash
+make host_pinvoke_release
+```
+
+Copy `libzt.dll/so/dylib` into this project directory:
 
 ```
-make debug|release
+cp ../../lib/release/${YOUR_HOST_TUPLE}-pinvoke/libzt.* .
+```
+Where `${YOUR_HOST_TUPLE}` is something like: `linux-x86_64`, `macOS-x86_64`, etc.
+
+Build language binding layer, `ZeroTier.Sockets.dll`:
+
+```bash
+cd examples/csharp
+${CSHARP_COMPILER} -target:library -out:ZeroTier.Sockets.dll ../../src/bindings/csharp/*.cs
+${CSHARP_COMPILER} -reference:ZeroTier.Sockets.dll example.cs
 ./example.exe
 ```
-
-## Development notes
-
-The SWIG interface file `zt.i` is only present for historical reference purposes. SWIG generates a ton of unnecessary boilerplate code which is hard to completely prevent using hints. You can generate a new wrapper for yourself using `swig -c++ -csharp -dllimport "./libzt.so" zt.i` but I would not recommend doing so unless you know what you're in for.
\ No newline at end of file
+Where `${CSHARP_COMPILER}` may be `csc` or `mono-csc` depending on your platform.
diff --git a/include/ZeroTierSockets.h b/include/ZeroTierSockets.h
index fd2e996..b8776ca 100644
--- a/include/ZeroTierSockets.h
+++ b/include/ZeroTierSockets.h
@@ -39,6 +39,11 @@
 extern "C" {
 #endif
 
+#ifdef ZTS_PINVOKE
+	// Used by P/INVOKE wrappers
+	typedef void (*CppCallback)(void *msg);
+#endif
+
 //////////////////////////////////////////////////////////////////////////////
 // Event codes                                                              //
 //////////////////////////////////////////////////////////////////////////////
@@ -1096,8 +1101,6 @@ ZTS_API int ZTCALL zts_disable_local_storage(uint8_t disabled);
  * @return ZTS_ERR_OK on success. ZTS_ERR_SERVICE or ZTS_ERR_ARG on failure
  */
 #ifdef ZTS_PINVOKE
-	// Used by P/INVOKE wrappers
-	typedef void (*CppCallback)(void *msg);
 	ZTS_API int ZTCALL zts_start(const char *path, CppCallback callback, uint16_t port);
 #else
 	ZTS_API int ZTCALL zts_start(const char *path, void (*callback)(void *), uint16_t port);
diff --git a/ports/zt.i b/ports/zt.i
deleted file mode 100644
index 69aa836..0000000
--- a/ports/zt.i
+++ /dev/null
@@ -1,30 +0,0 @@
-/* libzt.i */
-
-%begin
-%{
-#define SWIG_PYTHON_CAST_MODE
-%}
-
-%include <stdint.i>
-
-#define PYTHON_BUILD 1
-
-%module libzt
-%{
-#include "../include/ZeroTier.h"
-#include "../include/ZeroTierConstants.h"
-%}
-
-%define %cs_callback(TYPE, CSTYPE)
-    %typemap(ctype) TYPE, TYPE& "void *"
-    %typemap(in) TYPE  %{ $1 = ($1_type)$input; %}
-    %typemap(in) TYPE& %{ $1 = ($1_type)&$input; %}
-    %typemap(imtype, out="IntPtr") TYPE, TYPE& "CSTYPE"
-    %typemap(cstype, out="IntPtr") TYPE, TYPE& "CSTYPE"
-    %typemap(csin) TYPE, TYPE& "$csinput"
-%enddef
-
-%cs_callback(userCallbackFunc, CSharpCallback)
-
-%include "../include/ZeroTier.h"
-%include "../include/ZeroTierConstants.h"
diff --git a/src/README.md b/src/README.md
new file mode 100644
index 0000000..244e119
--- /dev/null
+++ b/src/README.md
@@ -0,0 +1,4 @@
+# C++ Source
+
+ - C API is exposed via [include/ZeroTierSockets.h](./../include/ZeroTierSocket.h)
+ - [bindings/](./bindings) Contains the source for wrappers in various languages. See [examples/](./../examples) for their usage.
\ No newline at end of file
diff --git a/src/bindings/README.md b/src/bindings/README.md
new file mode 100644
index 0000000..54895e0
--- /dev/null
+++ b/src/bindings/README.md
@@ -0,0 +1,4 @@
+# Language Bindings
+
+These subdirectories contain the abstraction implementations for using libzt in an idiomatic way for languages other than C\C++. Packages which may draw upon these sources are found in [pkg/](../../pkg). Example usage of these bindings can be found in [examples/](../../examples).
+
diff --git a/examples/csharp/Constants.cs b/src/bindings/csharp/Constants.cs
similarity index 100%
rename from examples/csharp/Constants.cs
rename to src/bindings/csharp/Constants.cs
diff --git a/examples/csharp/Event.cs b/src/bindings/csharp/Event.cs
similarity index 100%
rename from examples/csharp/Event.cs
rename to src/bindings/csharp/Event.cs
diff --git a/examples/csharp/Node.cs b/src/bindings/csharp/Node.cs
similarity index 99%
rename from examples/csharp/Node.cs
rename to src/bindings/csharp/Node.cs
index c12e868..f859ab9 100644
--- a/examples/csharp/Node.cs
+++ b/src/bindings/csharp/Node.cs
@@ -204,10 +204,10 @@ namespace ZeroTier
 		public Node(string configFilePath, ZeroTierManagedEventCallback managedCallback, UInt16 servicePort)
 		{
 			if (String.IsNullOrEmpty(configFilePath)) {
-				throw new ArgumentNullException(nameof(configFilePath));
+				throw new ArgumentNullException("configFilePath");
 			}
 			if (managedCallback == null) {
-				throw new ArgumentNullException(nameof(managedCallback));
+				throw new ArgumentNullException("managedCallback");
 			}
 			_nodeId = 0x0;
 			_configFilePath = configFilePath;
diff --git a/src/bindings/csharp/README.md b/src/bindings/csharp/README.md
new file mode 100644
index 0000000..3793e1c
--- /dev/null
+++ b/src/bindings/csharp/README.md
@@ -0,0 +1,4 @@
+# C# Language Bindings
+
+ - Install (via [NuGet package](https://www.nuget.org/packages/ZeroTier.Sockets/)): `Install-Package ZeroTier.Sockets`
+ - Example usage: [examples/csharp](./../../../examples/csharp/)
diff --git a/examples/csharp/Socket.cs b/src/bindings/csharp/Socket.cs
similarity index 98%
rename from examples/csharp/Socket.cs
rename to src/bindings/csharp/Socket.cs
index 4f240aa..890d16c 100644
--- a/examples/csharp/Socket.cs
+++ b/src/bindings/csharp/Socket.cs
@@ -135,7 +135,7 @@ namespace ZeroTier
 				throw new ZeroTier.SocketException((int)Constants.ERR_SOCKET);
 			}
 			if (remoteEndPoint == null) {
-				throw new ArgumentNullException(nameof(remoteEndPoint));
+				throw new ArgumentNullException("remoteEndPoint");
 			}
 			int err = Constants.ERR_OK;
 			int addrlen = 0;
@@ -194,7 +194,7 @@ namespace ZeroTier
 				throw new ZeroTier.SocketException((int)Constants.ERR_SOCKET);
 			}
 			if (localEndPoint == null) {
-				throw new ArgumentNullException(nameof(localEndPoint));
+				throw new ArgumentNullException("localEndPoint");
 			}
 			int err = Constants.ERR_OK;
 			int addrlen = 0;
@@ -412,7 +412,7 @@ namespace ZeroTier
 				throw new ZeroTier.SocketException((int)ZeroTier.Constants.ERR_SOCKET);
 			}
 			if (buffer == null) {
-				throw new ArgumentNullException(nameof(buffer));
+				throw new ArgumentNullException("buffer");
 			}
 			int flags = 0;
 			IntPtr bufferPtr = Marshal.UnsafeAddrOfPinnedArrayElement(buffer, 0);
@@ -428,7 +428,7 @@ namespace ZeroTier
 				throw new ZeroTier.SocketException((int)ZeroTier.Constants.ERR_SOCKET);
 			}
 			if (buffer == null) {
-				throw new ArgumentNullException(nameof(buffer));
+				throw new ArgumentNullException("buffer");
 			}
 			int flags = 0;
 			IntPtr bufferPtr = Marshal.UnsafeAddrOfPinnedArrayElement(buffer, 0);
diff --git a/examples/csharp/SocketException.cs b/src/bindings/csharp/SocketException.cs
similarity index 92%
rename from examples/csharp/SocketException.cs
rename to src/bindings/csharp/SocketException.cs
index 7945fc0..0b47cd2 100644
--- a/examples/csharp/SocketException.cs
+++ b/src/bindings/csharp/SocketException.cs
@@ -30,9 +30,9 @@ namespace ZeroTier
 			SocketErrorCode = _socketErrorCode;
 		}
 		/// <value>High-level service error code. See Constants.cs</value>
-		public int ServiceErrorCode { get; }
+		public int ServiceErrorCode { get; private set; }
 
 		/// <value>Low-level socket error code. See Constants.cs</value>
-		public int SocketErrorCode { get; }
+		public int SocketErrorCode { get; private set; }
 	}
 }
\ No newline at end of file
diff --git a/examples/csharp/zt.i b/src/bindings/csharp/zt.i
similarity index 100%
rename from examples/csharp/zt.i
rename to src/bindings/csharp/zt.i
diff --git a/examples/csharp/zt_wrap.cxx b/src/bindings/csharp/zt_wrap.cxx
similarity index 100%
rename from examples/csharp/zt_wrap.cxx
rename to src/bindings/csharp/zt_wrap.cxx