Update build.yml

.github/workflows/build.yml

@@ -6,11 +6,8 @@ jobs:
   build:
     runs-on: windows-latest
     steps:
-      - name: Checkout
+      - name: checkout
         uses: actions/checkout@master
       
-      - name: Build Net_40
-        run: dotnet build src/Net_40/HandyControl_Net_40/HandyControl_Net_40.csproj -p:Configuration=Release-Net40
-
-      - name: Build Net_GE45
-        run: dotnet build src/Net_GE45/HandyControl_Net_GE45/HandyControl_Net_GE45.csproj -p:Configuration=Release
+      - name: build
+        run: powershell build/build.ps1