dotnet · timcassell · Feb 17, 2026 · Feb 12, 2026 · Feb 16, 2026 · Feb 16, 2026
diff --git a/src/BenchmarkDotNet/Attributes/ConfigAttribute.cs b/src/BenchmarkDotNet/Attributes/ConfigAttribute.cs
@@ -1,8 +1,6 @@
 using System;
 using BenchmarkDotNet.Configs;
 
-#nullable enable
-
 namespace BenchmarkDotNet.Attributes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Assembly)]

diff --git a/src/BenchmarkDotNet/Attributes/Jobs/SimpleJobAttribute.cs b/src/BenchmarkDotNet/Attributes/Jobs/SimpleJobAttribute.cs
@@ -5,8 +5,6 @@
 using BenchmarkDotNet.Jobs;
 using JetBrains.Annotations;
 
-#nullable enable
-
 namespace BenchmarkDotNet.Attributes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Assembly, AllowMultiple = true)]

diff --git a/src/BenchmarkDotNet/BenchmarkDotNet.csproj b/src/BenchmarkDotNet/BenchmarkDotNet.csproj
@@ -10,6 +10,7 @@
     <RootNamespace>BenchmarkDotNet</RootNamespace>
     <!-- needed for docfx xref resolver -->
     <ProduceReferenceAssembly>True</ProduceReferenceAssembly>
+    <Nullable>enable</Nullable>
   </PropertyGroup>
   <ItemGroup>
     <EmbeddedResource Include="Templates\*" Exclude="bin\**;obj\**;**\*.xproj;packages\**;@(EmbeddedResource)" />

diff --git a/src/BenchmarkDotNet/Characteristics/Characteristic.cs b/src/BenchmarkDotNet/Characteristics/Characteristic.cs
@@ -2,8 +2,6 @@
 using System.Diagnostics.CodeAnalysis;
 using static BenchmarkDotNet.Characteristics.CharacteristicHelper;
 
-#nullable enable
-
 namespace BenchmarkDotNet.Characteristics
 {
     public abstract class Characteristic
@@ -96,7 +94,7 @@ public object? this[CharacteristicObject obj]
 
         public bool HasChildCharacteristics => IsCharacteristicObjectSubclass(CharacteristicType);
 
-        internal virtual object? ResolveValueCore(CharacteristicObject obj, object currentValue) =>
+        internal virtual object? ResolveValueCore(CharacteristicObject obj, object? currentValue) =>
             ReferenceEquals(currentValue, EmptyValue) ? FallbackValue : currentValue;
 
         public override string ToString() => Id;

diff --git a/src/BenchmarkDotNet/Characteristics/CharacteristicHelper.cs b/src/BenchmarkDotNet/Characteristics/CharacteristicHelper.cs
@@ -6,8 +6,6 @@
 using System.Reflection;
 using JetBrains.Annotations;
 
-#nullable enable
-
 namespace BenchmarkDotNet.Characteristics
 {
     public static class CharacteristicHelper

diff --git a/src/BenchmarkDotNet/Characteristics/CharacteristicObject.cs b/src/BenchmarkDotNet/Characteristics/CharacteristicObject.cs
@@ -6,8 +6,6 @@
 using BenchmarkDotNet.Extensions;
 using JetBrains.Annotations;
 
-#nullable enable
-
 namespace BenchmarkDotNet.Characteristics
 {
     // TODO: better naming.

diff --git a/src/BenchmarkDotNet/Characteristics/CharacteristicPresenter.cs b/src/BenchmarkDotNet/Characteristics/CharacteristicPresenter.cs
@@ -5,8 +5,6 @@
 using BenchmarkDotNet.Helpers;
 using BenchmarkDotNet.Jobs;
 
-#nullable enable
-
 namespace BenchmarkDotNet.Characteristics
 {
     public abstract class CharacteristicPresenter

diff --git a/src/BenchmarkDotNet/Characteristics/CharacteristicSetPresenter.cs b/src/BenchmarkDotNet/Characteristics/CharacteristicSetPresenter.cs
@@ -7,8 +7,6 @@
 using System.Collections.Generic;
 using System.Linq;
 
-#nullable enable
-
 namespace BenchmarkDotNet.Characteristics
 {
     public abstract class CharacteristicSetPresenter

diff --git a/src/BenchmarkDotNet/Characteristics/Characteristic`1.cs b/src/BenchmarkDotNet/Characteristics/Characteristic`1.cs
@@ -1,8 +1,6 @@
 using System;
 using System.Diagnostics.CodeAnalysis;
 
-#nullable enable
-
 namespace BenchmarkDotNet.Characteristics
 {
     public class Characteristic<[DynamicallyAccessedMembers(CharacteristicObject.CharacteristicMemberTypes)] T> : Characteristic
@@ -30,7 +28,7 @@ internal Characteristic(
             set { obj.SetValue(this, value); }
         }
 
-        internal override object? ResolveValueCore(CharacteristicObject obj, object currentValue)
+        internal override object? ResolveValueCore(CharacteristicObject obj, object? currentValue)
         {
             if (Resolver == null)
                 return (T?)base.ResolveValueCore(obj, currentValue);

diff --git a/src/BenchmarkDotNet/Characteristics/CompositeResolver.cs b/src/BenchmarkDotNet/Characteristics/CompositeResolver.cs
@@ -2,8 +2,6 @@
 using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 
-#nullable enable
-
 namespace BenchmarkDotNet.Characteristics
 {
     public class CompositeResolver : IResolver

diff --git a/src/BenchmarkDotNet/Characteristics/IResolver.cs b/src/BenchmarkDotNet/Characteristics/IResolver.cs
@@ -1,7 +1,5 @@
 using System.Diagnostics.CodeAnalysis;
 
-#nullable enable
-
 namespace BenchmarkDotNet.Characteristics
 {
     /// <summary>

diff --git a/src/BenchmarkDotNet/Characteristics/Resolver.cs b/src/BenchmarkDotNet/Characteristics/Resolver.cs
@@ -2,8 +2,6 @@
 using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
 
-#nullable enable
-
 namespace BenchmarkDotNet.Characteristics
 {
     public class Resolver : IResolver

diff --git a/src/BenchmarkDotNet/Code/ArrayParam.cs b/src/BenchmarkDotNet/Code/ArrayParam.cs
@@ -5,8 +5,6 @@
 using BenchmarkDotNet.Helpers;
 using JetBrains.Annotations;
 
-#nullable enable
-
 namespace BenchmarkDotNet.Code
 {
     internal static class ArrayParam

diff --git a/src/BenchmarkDotNet/Code/CodeGenerator.cs b/src/BenchmarkDotNet/Code/CodeGenerator.cs
@@ -17,8 +17,6 @@
 using BenchmarkDotNet.Running;
 using RunMode = BenchmarkDotNet.Jobs.RunMode;
 
-#nullable enable
-
 namespace BenchmarkDotNet.Code
 {
     internal static class CodeGenerator

diff --git a/src/BenchmarkDotNet/Code/DeclarationsProvider.cs b/src/BenchmarkDotNet/Code/DeclarationsProvider.cs
@@ -3,8 +3,6 @@
 using BenchmarkDotNet.Extensions;
 using BenchmarkDotNet.Running;
 
-#nullable enable
-
 namespace BenchmarkDotNet.Code
 {
     internal abstract class DeclarationsProvider

diff --git a/src/BenchmarkDotNet/Columns/BaselineAllocationRatioColumn.cs b/src/BenchmarkDotNet/Columns/BaselineAllocationRatioColumn.cs
@@ -7,8 +7,6 @@
 using BenchmarkDotNet.Reports;
 using BenchmarkDotNet.Running;
 
-#nullable enable
-
 namespace BenchmarkDotNet.Columns
 {
     public class BaselineAllocationRatioColumn : BaselineCustomColumn

diff --git a/src/BenchmarkDotNet/Columns/BaselineCustomColumn.cs b/src/BenchmarkDotNet/Columns/BaselineCustomColumn.cs
@@ -5,8 +5,6 @@
 using BenchmarkDotNet.Running;
 using JetBrains.Annotations;
 
-#nullable enable
-
 namespace BenchmarkDotNet.Columns
 {
     public abstract class BaselineCustomColumn : IColumn

diff --git a/src/BenchmarkDotNet/Columns/BaselineRatioColumn.cs b/src/BenchmarkDotNet/Columns/BaselineRatioColumn.cs
@@ -5,8 +5,6 @@
 using BenchmarkDotNet.Reports;
 using BenchmarkDotNet.Running;
 
-#nullable enable
-
 namespace BenchmarkDotNet.Columns
 {
     public class BaselineRatioColumn : BaselineCustomColumn

diff --git a/src/BenchmarkDotNet/Columns/LogicalGroupColumn.cs b/src/BenchmarkDotNet/Columns/LogicalGroupColumn.cs
@@ -2,8 +2,6 @@
 using BenchmarkDotNet.Running;
 using JetBrains.Annotations;
 
-#nullable enable
-
 namespace BenchmarkDotNet.Columns
 {
     public class LogicalGroupColumn : IColumn

diff --git a/src/BenchmarkDotNet/Columns/MetricColumn.cs b/src/BenchmarkDotNet/Columns/MetricColumn.cs
@@ -6,8 +6,6 @@
 using Perfolizer.Metrology;
 using Pragmastat.Metrology;
 
-#nullable enable
-
 namespace BenchmarkDotNet.Columns
 {
     public class MetricColumn : IColumn

diff --git a/src/BenchmarkDotNet/Columns/RankColumn.cs b/src/BenchmarkDotNet/Columns/RankColumn.cs
@@ -6,8 +6,6 @@
 using BenchmarkDotNet.Running;
 using JetBrains.Annotations;
 
-#nullable enable
-
 namespace BenchmarkDotNet.Columns
 {
     public class RankColumn : IColumn

diff --git a/src/BenchmarkDotNet/Columns/StatisticColumn.cs b/src/BenchmarkDotNet/Columns/StatisticColumn.cs
@@ -12,8 +12,6 @@
 using Perfolizer.Metrology;
 using Pragmastat.Metrology;
 
-#nullable enable
-
 namespace BenchmarkDotNet.Columns
 {
     public interface IStatisticColumn : IColumn

diff --git a/src/BenchmarkDotNet/Columns/TargetMethodColumn.cs b/src/BenchmarkDotNet/Columns/TargetMethodColumn.cs
@@ -3,8 +3,6 @@
 using BenchmarkDotNet.Reports;
 using BenchmarkDotNet.Running;
 
-#nullable enable
-
 namespace BenchmarkDotNet.Columns
 {
     public class TargetMethodColumn : IColumn

diff --git a/src/BenchmarkDotNet/Configs/DebugConfig.cs b/src/BenchmarkDotNet/Configs/DebugConfig.cs
@@ -17,8 +17,6 @@
 
 using JetBrains.Annotations;
 
-#nullable enable
-
 namespace BenchmarkDotNet.Configs
 {
     /// <summary>

diff --git a/src/BenchmarkDotNet/Configs/DefaultConfig.cs b/src/BenchmarkDotNet/Configs/DefaultConfig.cs
@@ -19,8 +19,6 @@
 using BenchmarkDotNet.Running;
 using BenchmarkDotNet.Validators;
 
-#nullable enable
-
 namespace BenchmarkDotNet.Configs
 {
     public class DefaultConfig : IConfig

diff --git a/src/BenchmarkDotNet/Configs/IConfig.cs b/src/BenchmarkDotNet/Configs/IConfig.cs
@@ -14,8 +14,6 @@
 using BenchmarkDotNet.Running;
 using BenchmarkDotNet.Validators;
 
-#nullable enable
-
 namespace BenchmarkDotNet.Configs
 {
     public interface IConfig

diff --git a/src/BenchmarkDotNet/Configs/ImmutableConfigBuilder.cs b/src/BenchmarkDotNet/Configs/ImmutableConfigBuilder.cs
@@ -11,8 +11,6 @@
 using System.Collections.Immutable;
 using System.Linq;
 
-#nullable enable
-
 namespace BenchmarkDotNet.Configs
 {
     /// <summary>

diff --git a/src/BenchmarkDotNet/Configs/ManualConfig.cs b/src/BenchmarkDotNet/Configs/ManualConfig.cs
@@ -19,8 +19,6 @@
 using BenchmarkDotNet.Validators;
 using JetBrains.Annotations;
 
-#nullable enable
-
 namespace BenchmarkDotNet.Configs
 {
     public class ManualConfig : IConfig

diff --git a/src/BenchmarkDotNet/ConsoleArguments/CommandLineOptions.cs b/src/BenchmarkDotNet/ConsoleArguments/CommandLineOptions.cs
@@ -14,8 +14,6 @@
 using JetBrains.Annotations;
 using Perfolizer.Mathematics.OutlierDetection;
 
-#nullable enable
-
 namespace BenchmarkDotNet.ConsoleArguments
 {
     [SuppressMessage("ReSharper", "MemberCanBePrivate.Global")]

diff --git a/src/BenchmarkDotNet/ConsoleArguments/ConfigParser.cs b/src/BenchmarkDotNet/ConsoleArguments/ConfigParser.cs
@@ -31,8 +31,6 @@
 using BenchmarkDotNet.Toolchains.Mono;
 using Perfolizer.Metrology;
 
-#nullable enable
-
 namespace BenchmarkDotNet.ConsoleArguments
 {
     public static class ConfigParser
@@ -553,8 +551,7 @@ private static Job CreateJobForGivenRuntime(Job baseJob, string runtimeId, Comma
                                     runtimeId,
                                     runtimeFrameworkVersion: "",
                                     name: runtimeId,
-                                    options.CliPath?.FullName ?? "",
-                                    options.RestorePath?.FullName ?? "")));
+                                    options: options)));
                     }
 
                 case RuntimeMoniker.Mono:
@@ -677,8 +674,7 @@ private static Job MakeMonoJob(Job baseJob, CommandLineOptions options, MonoRunt
                         targetFrameworkMoniker: runtime.MsBuildMoniker,
                         runtimeFrameworkVersion: "",
                         name: runtime.Name,
-                        customDotNetCliPath: options.CliPath?.FullName ?? "",
-                        packagesPath: options.RestorePath?.FullName ?? "")));
+                        options: options)));
         }
 
         private static Job MakeMonoAOTLLVMJob(Job baseJob, CommandLineOptions options, string msBuildMoniker, RuntimeMoniker moniker)
@@ -694,11 +690,7 @@ private static Job MakeMonoAOTLLVMJob(Job baseJob, CommandLineOptions options, s
                 targetFrameworkMoniker: monoAotLLVMRuntime.MsBuildMoniker,
                 runtimeFrameworkVersion: "",
                 name: monoAotLLVMRuntime.Name,
-                customDotNetCliPath: options.CliPath?.FullName ?? "",
-                packagesPath: options.RestorePath?.FullName ?? "",
-                customRuntimePack: options.CustomRuntimePack ?? "",
-                aotCompilerPath: options.AOTCompilerPath?.ToString() ?? "",
-                aotCompilerMode: options.AOTCompilerMode));
+                options: options));
 
             return baseJob.WithRuntime(monoAotLLVMRuntime).WithToolchain(toolChain).WithId(monoAotLLVMRuntime.Name);
         }
@@ -708,12 +700,9 @@ private static Job CreateR2RJob(Job baseJob, CommandLineOptions options, Runtime
             var toolChain = R2RToolchain.From(
             new NetCoreAppSettings(
                 targetFrameworkMoniker: runtime.MsBuildMoniker,
-                runtimeFrameworkVersion: null,
+                runtimeFrameworkVersion: "",
                 name: runtime.Name,
-                customDotNetCliPath: options.CliPath?.FullName,
-                packagesPath: options.RestorePath?.FullName,
-                customRuntimePack: options.CustomRuntimePack,
-                aotCompilerPath: options.AOTCompilerPath != null ? options.AOTCompilerPath.ToString() : null));
+                options: options));
 
             return baseJob.WithRuntime(runtime).WithToolchain(toolChain).WithId(runtime.Name);
         }
@@ -735,10 +724,7 @@ private static Job MakeWasmJob(Job baseJob, CommandLineOptions options, string m
                 targetFrameworkMoniker: wasmRuntime.MsBuildMoniker,
                 runtimeFrameworkVersion: "",
                 name: wasmRuntime.Name,
-                customDotNetCliPath: options.CliPath?.FullName ?? "",
-                packagesPath: options.RestorePath?.FullName ?? "",
-                customRuntimePack: options.CustomRuntimePack ?? "",
-                aotCompilerMode: options.AOTCompilerMode));
+                options: options));
 
             return baseJob.WithRuntime(wasmRuntime).WithToolchain(toolChain).WithId(wasmRuntime.Name);
         }
@@ -785,10 +771,9 @@ private static Job CreateCoreJobWithCli(Job baseJob, CommandLineOptions options)
                 .WithToolchain(CsProjCoreToolchain.From(
                     new NetCoreAppSettings(
                         targetFrameworkMoniker: RuntimeInformation.GetCurrentRuntime().MsBuildMoniker,
-                        customDotNetCliPath: options.CliPath?.FullName ?? "",
                         runtimeFrameworkVersion: "",
                         name: RuntimeInformation.GetCurrentRuntime().Name,
-                        packagesPath: options.RestorePath?.FullName ?? "")));
+                        options: options)));
 
         /// <summary>
         /// we have a limited amount of space when printing the output to the console, so we try to keep things small and simple

diff --git a/src/BenchmarkDotNet/ConsoleArguments/ListBenchmarks/Node.cs b/src/BenchmarkDotNet/ConsoleArguments/ListBenchmarks/Node.cs
@@ -1,7 +1,5 @@
 using System.Collections.Generic;
 
-#nullable enable
-
 namespace BenchmarkDotNet.ConsoleArguments.ListBenchmarks
 {
     internal class Node

diff --git a/src/BenchmarkDotNet/ConsoleArguments/LoggerWrapper.cs b/src/BenchmarkDotNet/ConsoleArguments/LoggerWrapper.cs
@@ -2,8 +2,6 @@
 using System.Text;
 using BenchmarkDotNet.Loggers;
 
-#nullable enable
-
 namespace BenchmarkDotNet.ConsoleArguments
 {
     internal class LoggerWrapper : TextWriter

diff --git a/src/BenchmarkDotNet/Detectors/Cpu/HardwareIntrinsics.cs b/src/BenchmarkDotNet/Detectors/Cpu/HardwareIntrinsics.cs
@@ -9,8 +9,6 @@
 using System.Runtime.Intrinsics.Arm;
 #endif
 
-#nullable enable
-
 namespace BenchmarkDotNet.Detectors.Cpu
 {
     // based on https://github.com/dotnet/runtime/tree/v10.0.0-rc.1.25451.107/src/coreclr/tools/Common/JitInterface/ThunkGenerator/InstructionSetDesc.txt

diff --git a/src/BenchmarkDotNet/Detectors/Cpu/Linux/LinuxCpuInfoParser.cs b/src/BenchmarkDotNet/Detectors/Cpu/Linux/LinuxCpuInfoParser.cs
@@ -10,8 +10,6 @@
 
 namespace BenchmarkDotNet.Detectors.Cpu.Linux;
 
-#nullable enable
-
 internal static class LinuxCpuInfoParser
 {
     private static class ProcCpu