modernize repo and setup CI

.dockerignore

@@ -0,0 +1,7 @@
+.git
+**/.vs
+**/bin
+**/obj
+**/packages
+**/*.user
+**/*.userprefs

.github/workflows/ci.yml

@@ -0,0 +1,31 @@
+name: CI
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+        with:
+          persist-credentials: false
+
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v5
+        with:
+          dotnet-version: "8.0.x"
+
+      - name: Restore
+        run: dotnet restore MifielAPI/MifielAPI.sln
+
+      - name: Build
+        run: dotnet build MifielAPI/MifielAPI.sln --configuration Release --no-restore
+
+      - name: Test
+        run: dotnet test MifielAPI/MifielAPI.sln --configuration Release --no-build --verbosity normal

.gitignore

@@ -158,6 +158,14 @@ publish/
 *.nuget.props
 *.nuget.targets
 
+# Packed artifacts
+artifacts/
+
+# Local pre-release smoke tests
+MifielAPI/MifielAPI.Tests/CsharpDocumentSmokeTests.cs
+MifielAPI/MifielAPI.Tests/csharp-test-pdf.pdf
+test.sh
+
 # Microsoft Azure Build Output
 csx/
 *.build.csdef

CHANGELOG.md

@@ -7,10 +7,12 @@
 - Default API host changed from `https://www.mifiel.com` to `https://app.mifiel.com`.
 - Sandbox documentation and examples now use `https://app-sandbox.mifiel.com` instead of `https://sandbox.mifiel.com`.
 - Package version jumped from `0.0.4` to `1.0.0` to mark this default-host breaking change.
+- The library now targets **.NET 8 (`net8.0`)** instead of .NET Framework 4.5. .NET Framework and Mono are no longer supported. Consumers should use `dotnet add package MifielAPIClient` on .NET 8 or later.
+- Packaging moved from Mono/`msbuild`/`nuget.exe` to the .NET SDK (`dotnet pack`, `dotnet nuget push`).
 
 ### Features
 
-- Send a standardized `User-Agent` on API requests, e.g. `DOTNET/4.0.30319.42000 MifielAPIClient/1.0.0 HttpClient/4.0.0.0 (Unix/6.8.0)`.
+- Send a standardized `User-Agent` on API requests, e.g. `DOTNET/8.0.0 MifielAPIClient/1.0.0 HttpClient/8.0.0.0 (Unix/24.6.0)`.
 
 ### Migration
 

Dockerfile

@@ -0,0 +1,15 @@
+# Build and run tests with the .NET SDK (this library targets net8.0).
+# Usage:
+#   docker build -t csharp-api-client-tests .
+#   docker run --rm csharp-api-client-tests
+FROM mcr.microsoft.com/dotnet/sdk:8.0
+
+WORKDIR /src
+COPY . /src
+
+RUN dotnet restore MifielAPI/MifielAPI.sln \
+    && dotnet build MifielAPI/MifielAPI.sln --configuration Release --no-restore \
+    && chown -R app:app /src
+
+USER app
+CMD ["dotnet", "test", "MifielAPI/MifielAPI.sln", "--configuration", "Release", "--no-build", "--filter", "Category!=Smoke"]