Fix mpc run failure at build time

.github/workflows/build-debug.yml

@@ -10,15 +10,13 @@ on:
       - '**.md'
       - .github/**
       - docs/**
-      - samples/**
   pull_request:
     branches:
       - main
     paths-ignore:
       - '**.md'
       - .github/**
       - docs/**
-      - samples/**
 
 env:
   BUILD_CONFIG: Debug

samples/ChatApp/ChatApp.Shared/ChatApp.Shared.csproj

@@ -4,12 +4,6 @@
     <TargetFramework>netstandard2.0</TargetFramework>
   </PropertyGroup>
 
-  <ItemGroup>
-    <None Remove="**\package.json" />
-    <None Remove="**\*.asmdef" />
-    <None Remove="**\*.meta" />
-  </ItemGroup>
-
   <ItemGroup>
     <ProjectReference Include="..\..\..\src\MagicOnion.Abstractions\MagicOnion.Abstractions.csproj" />
   </ItemGroup>

samples/ChatApp/ChatApp.Shared/Directory.Build.props

@@ -1,14 +1,16 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <PropertyGroup>
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
     <!--
-      prior to .NET 8
-      <BaseIntermediateOutputPath>.artifacts\obj\</BaseIntermediateOutputPath>
-		  <BaseOutputPath>.artifacts\bin\</BaseOutputPath>
-    -->
-
-    <!-- after .NET 8: https://learn.microsoft.com/en-us/dotnet/core/sdk/artifacts-output -->
-    <!-- Unity ignores . prefix folder -->
+    Override the output path of build artifacts.
+    This is necessary to change the path to one with a dot(.) prefix to hide generated items from Unity.
+  -->
+  <PropertyGroup>
+    <!-- Using .NET 8 and later, use ArtifactsPath property. -->
+    <!-- https://learn.microsoft.com/en-us/dotnet/core/sdk/artifacts-output -->
     <ArtifactsPath>$(MSBuildThisFileDirectory).artifacts</ArtifactsPath>
+    <!-- Using .NET 7 and ealier, use BaseIntermediateOutputPath and BaseOutputPath property instead. -->
+    <!-- NOTE: Currently, even if .NET 8 SDK is installed, MessagePack.Generator still requires these properties to be set. -->
+    <BaseIntermediateOutputPath>.artifacts\obj\</BaseIntermediateOutputPath>
+    <BaseOutputPath>.artifacts\bin\</BaseOutputPath>
   </PropertyGroup>
 </Project>

samples/ChatApp/ChatApp.Shared/Directory.Build.targets

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <!-- Hide Unity-specific files from Visual Studio and .NET SDK -->
+  <ItemGroup>
+    <None Remove="**\package.json" />
+    <None Remove="**\*.asmdef" />
+    <None Remove="**\*.meta" />
+  </ItemGroup>
+
+  <!-- Hide build artifacts from Visual Studio and .NET SDK -->
+  <ItemGroup>
+    <None Remove=".artifacts\**\**.*" />
+    <None Remove="obj\**\*.*;bin\**\*.*" />
+    <Compile Remove=".artifacts\**\**.*" />
+    <Compile Remove="bin\**\*.*;obj\**\*.*" />
+    <EmbeddedResource Remove=".artifacts\**\**.*" />
+    <EmbeddedResource Remove="bin\**\*.*;obj\**\*.*" />
+  </ItemGroup>
+</Project>