Build project with .NET 5 minimum framework requirement

Signed-off-by: Chase Redmon <redmon.chase@gmail.com>

Author: ChaseDRedmon

Directory.Build.props

@@ -4,7 +4,7 @@
   </PropertyGroup>
 
   <PropertyGroup>
-    <TargetFramework>net9.0</TargetFramework>
+    <LangVersion>latest</LangVersion>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>

Keymapp.NET.slnx

@@ -19,6 +19,7 @@
     <File Path="README.md" />
     <File Path="license.md" />
     <File Path="nuget.config" />
+    <File Path=".github\workflows\release.yml" />
   </Folder>
   <Folder Name="/src/">
     <Project Path="src\Keymapp.NET\Keymapp.NET.csproj" Type="Classic C#">

samples/Sample/Sample.csproj

@@ -1,6 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
     <OutputType>Exe</OutputType>
   </PropertyGroup>
 

src/Keymapp.NET/Guard.cs

@@ -1,4 +1,5 @@
-using System.Diagnostics.CodeAnalysis;
+using Grpc.Net.Client;
+using System.Diagnostics.CodeAnalysis;
 using System.Runtime.CompilerServices;
 
 namespace Keymapp.NET;
@@ -16,4 +17,12 @@ internal static void ThrowBrightnessOutOfRangeException([CallerMemberName] strin
     {
         throw new ArgumentOutOfRangeException(name, value, "Brightness steps must be between 1 and 255");
     }
+
+    internal static void ThrowIfNull(GrpcChannel? channel)
+    {
+        if (channel is null)
+        {
+            throw new ArgumentNullException(nameof(channel));
+        }
+    }
 }

src/Keymapp.NET/Keymapp.NET.csproj

@@ -1,5 +1,9 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
+  <PropertyGroup>
+    <TargetFramework>net5.0</TargetFramework>
+  </PropertyGroup>
+  
   <ItemGroup>
     <PackageReference Include="Google.Protobuf"/>
     <PackageReference Include="Grpc.Net.Client"/>

src/Keymapp.NET/KeymappApi.cs

@@ -223,14 +223,15 @@ public sealed class KeymappApi : IKeymappApi
     // Explicit constructor for automatic connection
     public KeymappApi(GrpcChannel channel)
     {
-        ArgumentNullException.ThrowIfNull(channel);
+        Guard.ThrowIfNull(channel);
+        
         _client ??= new KeyboardService.KeyboardServiceClient(channel);
         _lazyConnect = new Lazy<ValueTask>(() => ConnectAsync(channel));
     }
 
     public async ValueTask ConnectAsync(GrpcChannel channel, CancellationToken ct = default)
     {
-        ArgumentNullException.ThrowIfNull(channel);
+        Guard.ThrowIfNull(channel);
 
         try
         {

tests/Keymapp.NET.Tests.Integration/Keymapp.NET.Tests.Integration.csproj

@@ -1,5 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
     <IsPackable>false</IsPackable>
     <RootNamespace>Keymapp.NET.IntegrationTests</RootNamespace>
   </PropertyGroup>