feat: support csharp 12

.github/workflows/ci.yml

@@ -31,20 +31,20 @@ jobs:
       if: matrix.os == 'windows-latest'
 
     - run: dotnet test -c Release -f net8.0 --no-build --collect:"XPlat Code Coverage"
-      if: matrix.os == 'ubuntu-latest'
 
     - run: dotnet test -c Release -f net7.0 --no-build --collect:"XPlat Code Coverage"
+      if: matrix.os == 'ubuntu-latest'
 
     - run: dotnet test -c Release -f net6.0 --no-build --collect:"XPlat Code Coverage"
       if: matrix.os == 'ubuntu-latest'
 
     - uses: codecov/codecov-action@v3
       if: matrix.os == 'ubuntu-latest'
 
-    - run: dotnet run -c Release --no-build -f net7.0 --project src/docfx -- docs/docfx.json
+    - run: dotnet run -c Release --no-build -f net8.0 --project src/docfx -- docs/docfx.json
 
-    - run: dotnet run -c Release --no-build -f net7.0 --project src/docfx -- metadata samples/seed/docfx.json
-    - run: dotnet run -c Release --no-build -f net7.0 --project src/docfx -- build samples/seed/docfx.json --output docs/_site/seed
+    - run: dotnet run -c Release --no-build -f net8.0 --project src/docfx -- metadata samples/seed/docfx.json
+    - run: dotnet run -c Release --no-build -f net8.0 --project src/docfx -- build samples/seed/docfx.json --output docs/_site/seed
 
     - uses: actions/upload-artifact@v3
       if: matrix.os == 'ubuntu-latest'
@@ -64,7 +64,7 @@ jobs:
     - uses: ./.github/actions/build
 
     - run: dotnet build -c Release samples/extensions/build
-    - run: dotnet test -c Release -f net7.0 --no-build --filter Stage=Snapshot
+    - run: dotnet test -c Release -f net8.0 --no-build --filter Stage=Snapshot
       working-directory: test/docfx.Snapshot.Tests
       env:
         SNAPSHOT_TEST: true

.github/workflows/release.yml

@@ -32,9 +32,9 @@ jobs:
 
     - name: dotnet publish
       run: |
-        dotnet publish src/docfx -f net7.0 -c Release /p:Version=${GITHUB_REF_NAME#v} --self-contained -r win-x64 -o drop/publish/win-x64
-        dotnet publish src/docfx -f net7.0 -c Release /p:Version=${GITHUB_REF_NAME#v} --self-contained -r linux-x64 -o drop/publish/linux-x64
-        dotnet publish src/docfx -f net7.0 -c Release /p:Version=${GITHUB_REF_NAME#v} --self-contained -r osx-x64 -o drop/publish/osx-x64
+        dotnet publish src/docfx -f net8.0 -c Release /p:Version=${GITHUB_REF_NAME#v} --self-contained -r win-x64 -o drop/publish/win-x64
+        dotnet publish src/docfx -f net8.0 -c Release /p:Version=${GITHUB_REF_NAME#v} --self-contained -r linux-x64 -o drop/publish/linux-x64
+        dotnet publish src/docfx -f net8.0 -c Release /p:Version=${GITHUB_REF_NAME#v} --self-contained -r osx-x64 -o drop/publish/osx-x64
         mkdir -p drop/bin
 
     - run: zip -r ../../bin/docfx-win-x64-${GITHUB_REF_NAME}.zip .

Directory.Packages.props

@@ -41,7 +41,8 @@
     <PackageVersion Include="Magick.NET-Q16-AnyCPU" Version="13.2.0" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.7.1" />
     <PackageVersion Include="Microsoft.Playwright" Version="1.37.1" />
-    <PackageVersion Include="NuGet.Frameworks" Version="6.7.0" />
+    <PackageVersion Include="NuGet.Frameworks" Version="6.7.0" Condition="'$(TargetFramework)' != 'net8.0'"  />
+    <PackageVersion Include="NuGet.Frameworks" Version="6.8.0-rc.112" Condition="'$(TargetFramework)' == 'net8.0'"  />
     <PackageVersion Include="Verify.DiffPlex" Version="2.2.1" />
     <PackageVersion Include="Verify.Xunit" Version="21.1.3" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="2.5.0" />

NuGet.config

@@ -5,9 +5,4 @@
     <add key="nuget.org" value="https://api.nuget.org/v3/index.json" />
     <add key="dotnet-tools" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-tools/nuget/v3/index.json" />
   </packageSources>
-  <packageSourceMapping>
-    <packageSource key="nuget.org">
-      <package pattern="*" />
-    </packageSource>
-  </packageSourceMapping>
 </configuration>

samples/csharp/src/CSharp.csproj

@@ -1,8 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-      <TargetFrameworks>net7.0</TargetFrameworks>
-      <LangVersion>latest</LangVersion>
+      <TargetFrameworks>net8.0</TargetFrameworks>
+      <LangVersion>preview</LangVersion>
       <Nullable>enable</Nullable>
       <ImplicitUsings>enable</ImplicitUsings>
       <AllowUnsafeBlocks>true</AllowUnsafeBlocks>

samples/csharp/src/CSharp12.cs

@@ -0,0 +1,78 @@
+namespace CSharp12;
+
+using Markdown = string;
+
+public class PrimaryConstructors
+{
+    public readonly struct Distance(double dx, double dy)
+    {
+        public readonly double Magnitude = Math.Sqrt(dx * dx + dy * dy);
+        public readonly double Direction = Math.Atan2(dy, dx);
+    }
+
+    public class BankAccount(string accountID, string owner)
+    {
+        public string AccountID { get; } = accountID;
+        public string Owner { get; } = owner;
+
+        public override string ToString() => $"Account ID: {AccountID}, Owner: {Owner}";
+    }
+
+    public class CheckAccount(string accountID, string owner, decimal overdraftLimit = 0) : BankAccount(accountID, owner)
+    {
+        public decimal CurrentBalance { get; private set; } = 0;
+
+        public void Deposit(decimal amount)
+        {
+            if (amount < 0)
+            {
+                throw new ArgumentOutOfRangeException(nameof(amount), "Deposit amount must be positive");
+            }
+            CurrentBalance += amount;
+        }
+
+        public void Withdrawal(decimal amount)
+        {
+            if (amount < 0)
+            {
+                throw new ArgumentOutOfRangeException(nameof(amount), "Withdrawal amount must be positive");
+            }
+            if (CurrentBalance - amount < -overdraftLimit)
+            {
+                throw new InvalidOperationException("Insufficient funds for withdrawal");
+            }
+            CurrentBalance -= amount;
+        }
+
+        public override string ToString() => $"Account ID: {AccountID}, Owner: {Owner}, Balance: {CurrentBalance}";
+    }
+}
+
+public class CollectionExpressions
+{
+    public static int[] a = [1, 2, 3, 4, 5, 6, 7, 8];
+
+    public static Span<int> b  => ['a', 'b', 'c', 'd', 'e', 'f', 'h', 'i'];
+
+    public static int[][] twoD = [[1, 2, 3], [4, 5, 6], [7, 8, 9]];
+}
+
+public class DefaultLambdaParameters
+{
+    public void Foo()
+    {
+        var addWithDefault = (int addTo = 2) => addTo + 1;
+        addWithDefault(); // 3
+        addWithDefault(5); // 6
+
+        var counter = (params int[] xs) => xs.Length;
+        counter(); // 0
+        counter(1, 2, 3); // 3
+    }
+}
+
+[System.Runtime.CompilerServices.InlineArray(10)]
+public struct InlineArrays
+{
+    private int _element0;
+}