Refactor .NET Core Desktop workflow configuration

Updated the .NET Core Desktop workflow to include environment variable configurations and improved comments for clarity.

Author: wwcrdrvf6u

.github/workflows/dotnet-desktop.yml

@@ -0,0 +1,48 @@
+name: .NET Core Desktop Build
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+
+  build:
+
+    strategy:
+      matrix:
+        configuration: [Debug, Release]
+
+    runs-on: windows-latest
+
+    env:
+      Solution_Name: ShowWrite.sln  # 替换为你的解决方案名称
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+
+    # 安装 .NET Core SDK
+    - name: Install .NET Core
+      uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: 8.0.x
+
+    # 添加 MSBuild 到 PATH
+    - name: Setup MSBuild.exe
+      uses: microsoft/setup-msbuild@v2
+
+    # 还原 NuGet 包
+    - name: Restore NuGet packages
+      run: dotnet restore $env:Solution_Name
+
+    # 构建解决方案
+    - name: Build solution
+      run: msbuild $env:Solution_Name /p:Configuration=${{ matrix.configuration }} /p:Platform="Any CPU" /t:Build
+
+    # 可选：执行单元测试（如果有测试项目）
+    # - name: Run unit tests
+    #   run: dotnet test --no-build --verbosity normal