[csharp] add .net9 support (#20270)

* add .net9 support

* fixed path of new sample

* comment out manual test that does not exist

* comment out manual test that does not exist

* comment out manual test that does not exist

.github/workflows/samples-dotnet8.yaml

@@ -3,14 +3,12 @@ name: Samples C# .Net 8 Clients
 on:
   push:
     paths:
-      - samples/client/petstore/csharp/generichost/latest/**
       - samples/client/petstore/csharp/generichost/net8/**
       - samples/client/petstore/csharp/httpclient/net8/**
       - samples/client/petstore/csharp/restsharp/net8/**
       - samples/client/petstore/csharp/unityWebRequest/net8/**
   pull_request:
     paths:
-      - samples/client/petstore/csharp/generichost/latest/**
       - samples/client/petstore/csharp/generichost/net8/**
       - samples/client/petstore/csharp/httpclient/net8/**
       - samples/client/petstore/csharp/restsharp/net8/**
@@ -23,7 +21,6 @@ jobs:
       fail-fast: false
       matrix:
         sample:
-          - samples/client/petstore/csharp/generichost/latest/Tags
           - samples/client/petstore/csharp/generichost/net8/AllOf
           - samples/client/petstore/csharp/generichost/net8/AnyOf
           - samples/client/petstore/csharp/generichost/net8/AnyOfNoCompare

.github/workflows/samples-dotnet9.yaml

@@ -0,0 +1,48 @@
+name: Samples C# .Net 9 Clients
+
+on:
+  push:
+    paths:
+      - samples/client/petstore/csharp/generichost/latest/**
+      - samples/client/petstore/csharp/generichost/net9/**
+      - samples/client/petstore/csharp/httpclient/net9/**
+      - samples/client/petstore/csharp/restsharp/net9/**
+      - samples/client/petstore/csharp/unityWebRequest/net9/**
+  pull_request:
+    paths:
+      - samples/client/petstore/csharp/generichost/latest/**
+      - samples/client/petstore/csharp/generichost/net9/**
+      - samples/client/petstore/csharp/httpclient/net9/**
+      - samples/client/petstore/csharp/restsharp/net9/**
+      - samples/client/petstore/csharp/unityWebRequest/net9/**
+jobs:
+  build:
+    name: Build .Net projects
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        sample:
+          - samples/client/petstore/csharp/generichost/latest/Tags
+          - samples/client/petstore/csharp/generichost/net9/AllOf
+          - samples/client/petstore/csharp/generichost/net9/AnyOf
+          - samples/client/petstore/csharp/generichost/net9/AnyOfNoCompare
+          - samples/client/petstore/csharp/generichost/net9/FormModels
+          # - samples/client/petstore/csharp/generichost/net9/ManualPetstoreTests
+          # - samples/client/petstore/csharp/generichost/net9/ManualSourceGenerationTests
+          - samples/client/petstore/csharp/generichost/net9/NullReferenceTypes
+          - samples/client/petstore/csharp/generichost/net9/OneOf
+          - samples/client/petstore/csharp/generichost/net9/Petstore
+          - samples/client/petstore/csharp/generichost/net9/SourceGeneration
+          - samples/client/petstore/csharp/generichost/net9/UseDateTimeForDate
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-dotnet@v4.1.0
+        with:
+          dotnet-version: '9.0.101'
+      - name: Build
+        working-directory: ${{ matrix.sample }}
+        run: dotnet build Org.OpenAPITools.sln
+      - name: Test
+        working-directory: ${{ matrix.sample }}
+        run: dotnet test Org.OpenAPITools.sln