* remove run: dotnet new globaljson in favor of changing the hardcoded input dotnet-version of actions/setup-dotnet@v4 to global-json-file

* add `--locked-mode` param for run `dotnet restore`
@ actions/c#/action.yml

+ env `NUGET_PACKAGES` to use runner-level preinstalled NuGet packages
+ run ReSharper cli over the whole solution via `muno92/resharper_inspectcode@v1`, also restore/save cache around it
@ workflows/c#.yml
@ .github

$ dotnet new globaljson --sdk-version 8.0.0 # then set `rollForward: latestFeature`
@ c#

Author: n0099

.github/actions/c#/action.yml

@@ -8,7 +8,7 @@ runs:
         submodules: true
     - uses: actions/setup-dotnet@v4
       with: # https://github.com/actions/setup-dotnet/tree/v4
-        dotnet-version: 7
+        global-json-file: c#/global.json
         # cache: true
         # # https://github.com/actions/setup-node/issues/624#issuecomment-1328681525
         # cache-dependency-path: ${{ github.workspace }}/c#/*/packages.lock.json
@@ -18,14 +18,11 @@ runs:
     - id: cache-restore
       uses: actions/cache/restore@v4
       with:
-        path: ~/.nuget/packages
-        key: ${{ runner.os }}-nuget-${{ hashFiles('**/packages.lock.json') }}
+        path: ${{ github.workspace }}/.nuget/packages
+        key: ${{ runner.os }}-nuget-${{ hashFiles('c#/*/packages.lock.json') }}
         restore-keys: ${{ runner.os }}-nuget-
 
-    - run: dotnet new globaljson --sdk-version 7.0.405
-      working-directory: c#
-      shell: bash
-    - run: dotnet restore
+    - run: dotnet restore --locked-mode
       working-directory: c#
       shell: bash
 
@@ -34,5 +31,5 @@ runs:
     - uses: actions/cache/save@v4
       if: ${{ steps.cache-restore.outputs.cache-hit != 'true' }}
       with:
-        path: ~/.nuget/packages
+        path: ${{ github.workspace }}/.nuget/packages
         key: ${{ steps.cache-restore.outputs.cache-primary-key }}

.github/workflows/c#.yml

@@ -11,7 +11,40 @@ jobs:
     strategy:
       matrix:
         project: [crawler, imagePipeline, shared, tbClient]
+    env:
+      NUGET_PACKAGES: ${{ github.workspace }}/.nuget/packages
     steps:
       - uses: actions/checkout@v4
       - uses: ./.github/actions/c#
       - run: dotnet build --no-restore -c Debug ${{ matrix.project }}
+
+  ReSharper:
+    runs-on: ubuntu-latest
+    env:
+      NUGET_PACKAGES: ${{ github.workspace }}/.nuget/packages
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.github/actions/c#
+
+      - id: cache-restore
+        uses: actions/cache/restore@v4
+        with:
+          path: |
+            ${{ github.workspace }}/.resharper
+            ~/.dotnet/tools
+          key: ${{ runner.os }}-resharper-${{ hashFiles('c#/**/*') }}
+          restore-keys: ${{ runner.os }}-nuget-
+
+      - uses: muno92/resharper_inspectcode@v1
+        with:
+          solutionPath: c#/tbm.sln
+          cachesHome: ${{ github.workspace }}/.resharper
+
+      # https://github.com/actions/runner/issues/1478
+      - uses: actions/cache/save@v4
+        if: always() && steps.cache-restore.outputs.cache-hit != 'true'
+        with:
+          path: |
+            ${{ github.workspace }}/.resharper
+            ~/.dotnet/tools
+          key: ${{ steps.cache-restore.outputs.cache-primary-key }}

c#/global.json

@@ -0,0 +1,6 @@
+{
+  "sdk": {
+    "version": "8.0.0",
+    "rollForward": "latestFeature" // https://github.com/actions/setup-dotnet/pull/481
+  }
+}