chore: Update LangVersion to 14

build/BenchmarkDotNet.Build/BenchmarkDotNet.Build.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
     <RunWorkingDirectory>$(MSBuildProjectDirectory)</RunWorkingDirectory>
     <Nullable>enable</Nullable>
   </PropertyGroup>

build/BenchmarkDotNet.Build/Program.cs

@@ -62,7 +62,11 @@ public class InstallWasmToolsWorkload : FrostingTask<BuildContext>, IHelpProvide
 {
     private const string Name = "install-wasm-tools";
 
-    public override void Run(BuildContext context) => context.BuildRunner.InstallWorkload("wasm-tools");
+    public override void Run(BuildContext context)
+    {
+        context.BuildRunner.InstallWorkload("wasm-tools-net8");
+        context.BuildRunner.InstallWorkload("wasm-tools");
+    }
 
     public HelpInfo GetHelp()
     {

build/common.props

@@ -41,7 +41,7 @@
   </PropertyGroup>
 
   <PropertyGroup Condition=" '$(IsVisualBasic)' != 'true' AND '$(IsFsharp)' != 'true' ">
-    <LangVersion>12.0</LangVersion>
+    <LangVersion>14.0</LangVersion>
   </PropertyGroup>
 
   <PropertyGroup Condition=" '$(VersionPrefix)' == '' ">

build/sdk/global.json

@@ -1,6 +1,6 @@
 {
   "sdk": {
-    "version": "8.0.410",
+    "version": "10.0.100",
     "rollForward": "disable"
   }
 }

src/BenchmarkDotNet/Code/DeclarationsProvider.cs

@@ -86,15 +86,15 @@ internal class NonVoidDeclarationsProvider : DeclarationsProvider
         public NonVoidDeclarationsProvider(Descriptor descriptor) : base(descriptor) { }
 
         public override string ConsumeField
-            => !Consumer.IsConsumable(WorkloadMethodReturnType) && Consumer.HasConsumableField(WorkloadMethodReturnType, out var field)
-                ? $".{field.Name}"
+            => !Consumer.IsConsumable(WorkloadMethodReturnType) && Consumer.HasConsumableField(WorkloadMethodReturnType, out var fieldInfo)
+                ? $".{fieldInfo.Name}"
                 : null;
 
         protected override Type OverheadMethodReturnType
             => Consumer.IsConsumable(WorkloadMethodReturnType)
                 ? WorkloadMethodReturnType
-                : (Consumer.HasConsumableField(WorkloadMethodReturnType, out var field)
-                    ? field.FieldType
+                : (Consumer.HasConsumableField(WorkloadMethodReturnType, out var fieldInfo)
+                    ? fieldInfo.FieldType
                     : typeof(int)); // we return this simple type because creating bigger ValueType could take longer than benchmarked method itself
 
         public override string OverheadImplementation

tests/BenchmarkDotNet.IntegrationTests/LargeAddressAwareTest.cs

@@ -47,7 +47,7 @@ public void BenchmarkCanAllocateMoreThan2Gb()
                 .Any());
 
             Assert.Contains(".NET Framework", summary.AllRuntimes);
-            Assert.Contains(".NET 8.0", summary.AllRuntimes);
+            Assert.Contains(DotNetRuntimeHelper.GetExpectedDotNetCoreRuntimeName(), summary.AllRuntimes);
         }
     }
 

tests/BenchmarkDotNet.IntegrationTests/MultipleRuntimesTest.cs

@@ -51,7 +51,7 @@ public void SingleBenchmarkCanBeExecutedForMultipleRuntimes()
                 .Any());
 
             Assert.Contains(".NET Framework", summary.AllRuntimes);
-            Assert.Contains(".NET 8.0", summary.AllRuntimes);
+            Assert.Contains(DotNetRuntimeHelper.GetExpectedDotNetCoreRuntimeName(), summary.AllRuntimes);
         }
     }
 

tests/BenchmarkDotNet.IntegrationTests/NugetReferenceTests.cs

@@ -35,7 +35,12 @@ public void UserCanSpecifyCustomNuGetPackageDependency()
 
             // Validate NuGet package version output message
             var stdout = GetSingleStandardOutput(report);
-            Assert.Contains($"System.Collections.Immutable: {targetVersion}", stdout);
+
+            // When build oriject with .NET 10 SDK. PackageReference is pruned and SDK version assembly is used instead.
+            if (RuntimeInformation.IsNetCore && DotNetRuntimeHelper.GetExpectedDotNetCoreRuntimeName() == ".NET 10.0")
+                Assert.Contains(stdout, x => x.StartsWith("System.Collections.Immutable: 10.0."));
+            else
+                Assert.Contains($"System.Collections.Immutable: {targetVersion}", stdout);
         }
 
         [FactEnvSpecific("Roslyn toolchain does not support .NET Core", EnvRequirement.FullFrameworkOnly)]

tests/BenchmarkDotNet.Tests/Helpers/DotNetRuntimeHelper.cs

@@ -0,0 +1,15 @@
+using BenchmarkDotNet.Portability;
+using System;
+
+namespace BenchmarkDotNet
+{
+    public static class DotNetRuntimeHelper
+    {
+        public static string GetExpectedDotNetCoreRuntimeName()
+        {
+            return Environment.GetEnvironmentVariable("DOTNET_ROLL_FORWARD_ON_NO_CANDIDATE_FX") == "2"
+                ? ".NET 10.0"
+                : ".NET 8.0";
+        }
+    }
+}

tests/BenchmarkDotNet.Tests/RuntimeVersionDetectionTests.cs

@@ -120,7 +120,10 @@ public void CurrentRuntimeIsProperlyRecognized()
             else
                 Assert.True(runtime is MonoRuntime, $"Actual runtime: {runtime}, tfm: {runtime.MsBuildMoniker}, moniker: {runtime.RuntimeMoniker}");
 #else
-            Assert.True(runtime is CoreRuntime coreRuntime && coreRuntime.RuntimeMoniker == RuntimeMoniker.Net80, $"Actual runtime: {runtime}, tfm: {runtime.MsBuildMoniker}, moniker: {runtime.RuntimeMoniker}");
+            if (DotNetRuntimeHelper.GetExpectedDotNetCoreRuntimeName() == ".NET 10.0")
+                Assert.True(runtime is CoreRuntime coreRuntime && coreRuntime.RuntimeMoniker == RuntimeMoniker.Net10_0, $"Actual runtime: {runtime}, tfm: {runtime.MsBuildMoniker}, moniker: {runtime.RuntimeMoniker}");
+            else
+                Assert.True(runtime is CoreRuntime coreRuntime && coreRuntime.RuntimeMoniker == RuntimeMoniker.Net80, $"Actual runtime: {runtime}, tfm: {runtime.MsBuildMoniker}, moniker: {runtime.RuntimeMoniker}");
 #endif
         }
     }