retarget .net framework 2.0 for unity

Jacdac.NET.Clients/Jacdac.NET.Clients.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
 	<PropertyGroup>
-		<TargetFramework>net5.0</TargetFramework>
+		<TargetFramework>netstandard2.0</TargetFramework>
 		<GeneratePackageOnBuild>True</GeneratePackageOnBuild>
 	</PropertyGroup>
 

Jacdac.NET.Servers.SoundPlayer/Jacdac.NET.Servers.SoundPlayer.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net5.0</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <GeneratePackageOnBuild>True</GeneratePackageOnBuild>
   </PropertyGroup>
 

Jacdac.NET.Servers.SoundPlayer/NetCoreAudioSoundPlayer.cs

@@ -57,7 +57,7 @@ namespace Jacdac.Servers
         public void Play(string name)
         {
             if (name == null)
-                throw new ArgumentNullException(nameof(name));
+                throw new ArgumentNullException("name");
 
             var fileName = Path.GetFileNameWithoutExtension(name); // filter out rooted paths
             var mp3 = Path.Combine(this.soundDirectory, fileName + ".mp3");

Jacdac.NET.Transports.Hf2/Jacdac.NET.Transports.Hf2.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net5.0</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <GeneratePackageOnBuild>True</GeneratePackageOnBuild>
   </PropertyGroup>
 

Jacdac.NET.Transports.LibUsb/Jacdac.NET.Transports.LibUsb.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
 	<PropertyGroup>
-		<TargetFramework>net5.0</TargetFramework>
+		<TargetFramework>netstandard2.0</TargetFramework>
 		<ImplicitUsings>disable</ImplicitUsings>
 		<Nullable>disable</Nullable>
 		<GeneratePackageOnBuild>True</GeneratePackageOnBuild>

Jacdac.NET.Transports.Spi/Jacdac.NET.Transports.Spi.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
 	<PropertyGroup>
-		<TargetFramework>net5.0</TargetFramework>
+		<TargetFramework>netstandard2.0</TargetFramework>
 		<GeneratePackageOnBuild>True</GeneratePackageOnBuild>
 	</PropertyGroup>
 

Jacdac.NET.Transports.WebSockets/Jacdac.NET.Transports.WebSockets.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
 	<PropertyGroup>
-		<TargetFramework>net5.0</TargetFramework>
+		<TargetFramework>netstandard2.0</TargetFramework>
 		<ImplicitUsings>disable</ImplicitUsings>
 		<Nullable>disable</Nullable>
 		<GeneratePackageOnBuild>True</GeneratePackageOnBuild>

Jacdac.NET.Transports.WebSockets/WebSocketTransport.cs

@@ -52,7 +52,7 @@ namespace Jacdac.Transports.WebSockets
                     try
                     {
                         if (!t.IsFaulted && this.socket != null)
-                            this.socket.SendAsync(data, WebSocketMessageType.Binary, true, CancellationToken.None);
+                            this.socket.SendAsync(new ArraySegment<byte>(data), WebSocketMessageType.Binary, true, CancellationToken.None);
                     }
                     finally
                     {
@@ -91,7 +91,7 @@ namespace Jacdac.Transports.WebSockets
                     && this.socket != null)
                 {
                     var buffer = new byte[0xff];
-                    var res = await this.socket.ReceiveAsync(buffer, CancellationToken.None);
+                    var res = await this.socket.ReceiveAsync(new ArraySegment<byte>(buffer), CancellationToken.None);
                     if (res.Count > 0)
                     {
                         var frame = new byte[res.Count];
@@ -139,7 +139,7 @@ namespace Jacdac.Transports.WebSockets
                 this.socket = null;
                 if (socket.State != WebSocketState.Closed)
                     socket.CloseAsync(WebSocketCloseStatus.NormalClosure, null, CancellationToken.None)
-                        .ContinueWith(t => socket.Dispose());
+                        .ContinueWith(_ => socket.Dispose());
                 else socket.Dispose();
             }
         }

Jacdac.NET/FileSettingsStorage.cs

@@ -38,7 +38,7 @@ namespace Jacdac.Servers
             var lines = File.Exists(this.fileName) ? File.ReadAllLines(this.fileName) : new string[0];
             foreach (var line in lines)
             {
-                var kv = line.Split(":");
+                var kv = line.Split(':');
                 if (kv.Length != 2) continue;
                 var key = kv[0].Trim();
                 if (key.Length == 0) continue;
@@ -53,13 +53,15 @@ namespace Jacdac.Servers
             var dir = Path.GetDirectoryName(Path.GetFullPath(this.fileName));
             if (!Directory.Exists(dir))
                 Directory.CreateDirectory(dir);
-            using var writer = new StreamWriter(this.fileName);
-            foreach (var key in dic.Keys)
+            using (var writer = new StreamWriter(this.fileName))
             {
-                writer.Write(key.Replace(Environment.NewLine, " "));
-                writer.Write(": ");
-                writer.Write(HexEncoding.ToString(dic[key]));
-                writer.WriteLine();
+                foreach (var key in dic.Keys)
+                {
+                    writer.Write(key.Replace(Environment.NewLine, " "));
+                    writer.Write(": ");
+                    writer.Write(HexEncoding.ToString(dic[key]));
+                    writer.WriteLine();
+                }
             }
         }
 

Jacdac.NET/Jacdac.NET.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
 	<PropertyGroup>
-		<TargetFramework>net5.0</TargetFramework>
+		<TargetFramework>netstandard2.0</TargetFramework>
 		<ImplicitUsings>disable</ImplicitUsings>
 		<Nullable>disable</Nullable>
 		<GeneratePackageOnBuild>True</GeneratePackageOnBuild>

README.md

@@ -4,7 +4,7 @@
 for **microcontrollers** and their peripherals (sensors/actuators), 
 with applications to rapid prototyping, making, and physical computing. 
 
-This repository contains **.NET Core (5+)**, **.NET nanoframework** and **TinyCLR** client libraries for the [Jacdac](https://aka.ms/jacdac) protocol,
+This repository contains **.NET Framework 2.0**, **.NET nanoframework** and **TinyCLR** client libraries for the [Jacdac](https://aka.ms/jacdac) protocol,
 as well as transports over USB, SPI, WebSockets.
 
 * **[Jacdac .NET Documentation](https://microsoft.github.io/jacdac-docs/clients/dotnet)**
@@ -17,18 +17,18 @@ as well as transports over USB, SPI, WebSockets.
 
 The Jacdac project contains C# sources of the Jacdac protocol for various .NET runtime, including desktop or TinyClR.
 To avoid mscorlib issues, each platform recompiles these sources into its own assembly where C# files are simply shared as links.
-As a result, the C# used in the Jacdac project is .NET 5+/.NET nanoframework/TinyCLR compatible (and also inherits limitations thereof).
+As a result, the C# used in the Jacdac project is .NET Framework 2.0/.NET nanoframework/TinyCLR compatible (and also inherits limitations thereof).
 
-### [.NET Core](https://docs.microsoft.com/en-us/dotnet/core/introduction) and [.NET IoT Core](https://dotnet.microsoft.com/en-us/apps/iot)
+### [.NET Framework 2.0](https://dotnet.microsoft.com/en-us/) and [.NET IoT Core](https://dotnet.microsoft.com/en-us/apps/iot)
 
   - `Jacdac.NET`, core runtime
   - `Jacdac.NET.Clients`, service clients
   - `Jacdac.NET.Logging`, a logging provider that allows to send log messages over the Jacdac bus
   - `Jacdac.NET.Transports.Spi`, SPI transport layer for SPI Jacdapter using .NET IoT
   - `Jacdac.NET.Transports.WebSockets`, WebSocket transport
-  - `Jacdac.NET.Transports.Hf2`, HF2 protocol layer, .NET5
-  - `Jacdac.NET.Transports.LibUsb`, Usb transport based on [libusb](https://libusb.info/), .NET5 **(not functional, experimental)**
-  - `Jacdac.NET.Servers.SoundPlayer`, .NET sound player server implementation
+  - `Jacdac.NET.Transports.Hf2`, HF2 protocol layer, .NET Framework 2.0
+  - `Jacdac.NET.Transports.LibUsb`, Usb transport based on [libusb](https://libusb.info/), .NET Framework 2.0
+  - `Jacdac.NET.Servers.SoundPlayer`, .NET Framework 2.0 sound player server implementation
 
 ### [TinyCLR](https://www.ghielectronics.com/tinyclr/)