Cleanup dependencies and add net6.0 TFM (#2012)

* Ignore local BenchmarkDotNet.Disassembler packages

Ignore any BenchmarkDotNet.Disassembler NuGet packages created during a local build.

* Clean up dependencies

Clean up the package dependencies as described in #2009.

* Add net6.0 TFM

- Add a net6.0 TFM.
- Resolve supported platform and obsolete warnings for .NET 6.

* Add TODO for .NET Framework 4.8.1

Add a TODO to correctly return the version for .NET Framework 4.8.1.

* Suppress analyser diagnostics

- Suppress IDE0052 warning in Visual Studio.
- Suppress IDE0079 warning for redundant ReSharper warning in Visual Studio.

* Update Microsoft.CodeAnalysis.CSharp

Update Microsoft.CodeAnalysis.CSharp to 3.0.0 to use a version that targets netstandard2.0.

* Make IsFullFramework always false for net6.0

.NET 6 is not .NET Framework by definition.

* Use PlatformApis instead of Environment.OS*

See #2012 (comment).

Author: martincostello

.gitignore

@@ -49,6 +49,7 @@ artifacts/*
 BDN.Generated
 BenchmarkDotNet.Samples/Properties/launchSettings.json
 src/BenchmarkDotNet/Disassemblers/net461/*
+src/BenchmarkDotNet/Disassemblers/BenchmarkDotNet.Disassembler.*.nupkg
 
 # Visual Studio 2015 cache/options directory
 .vs/

src/BenchmarkDotNet/BenchmarkDotNet.csproj

@@ -2,7 +2,7 @@
   <Import Project="..\..\build\common.props" />
   <PropertyGroup>
     <AssemblyTitle>BenchmarkDotNet</AssemblyTitle>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <NoWarn>$(NoWarn);1701;1702;1705;1591;3005;NU1702;CS3001;CS3003</NoWarn>
     <AssemblyName>BenchmarkDotNet</AssemblyName>
@@ -17,18 +17,19 @@
     <PackageReference Include="CommandLineParser" Version="2.4.3" />
     <PackageReference Include="Iced" Version="1.17.0" />
     <PackageReference Include="Microsoft.Diagnostics.Runtime" Version="1.1.126102" />
-    <PackageReference Include="Microsoft.DotNet.PlatformAbstractions" Version="2.1.0" />
-    <PackageReference Include="Microsoft.Win32.Registry" Version="5.0.0" />
     <PackageReference Include="Perfolizer" Version="0.2.1" />
-    <PackageReference Include="System.Management" Version="5.0.0" />
-    <PackageReference Include="System.Reflection.Emit" Version="4.3.0" />
-    <PackageReference Include="System.Reflection.Emit.Lightweight" Version="4.3.0" />
-    <PackageReference Include="System.ValueTuple" Version="4.5.0" />
-    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.2" />
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="2.10.0" />
+    <PackageReference Include="System.Management" Version="6.0.0" />
+    <PackageReference Include="System.Reflection.Emit" Version="4.7.0" />
+    <PackageReference Include="System.Reflection.Emit.Lightweight" Version="4.7.0" />
+    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.4" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="3.0.0" />
     <PackageReference Include="Microsoft.Diagnostics.NETCore.Client" Version="0.2.61701" />
     <PackageReference Include="Microsoft.Diagnostics.Tracing.TraceEvent" Version="2.0.61" PrivateAssets="contentfiles;analyzers" />
   </ItemGroup>
+  <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard2.0' ">
+    <PackageReference Include="Microsoft.DotNet.PlatformAbstractions" Version="3.1.6" />
+    <PackageReference Include="Microsoft.Win32.Registry" Version="5.0.0" />
+  </ItemGroup>
   <ItemGroup Condition="'$(OS)' == 'Windows_NT'">
     <ProjectReference Include="..\BenchmarkDotNet.Disassembler.x64\BenchmarkDotNet.Disassembler.x64.csproj">
       <ReferenceOutputAssembly>false</ReferenceOutputAssembly>

src/BenchmarkDotNet/Engines/IEngine.cs

@@ -4,6 +4,7 @@
 using BenchmarkDotNet.Jobs;
 using BenchmarkDotNet.Reports;
 using JetBrains.Annotations;
+using NotNullAttribute = JetBrains.Annotations.NotNullAttribute;
 
 namespace BenchmarkDotNet.Engines
 {

src/BenchmarkDotNet/Environments/OsBrandStringHelper.cs

@@ -4,6 +4,7 @@
 using System.Linq;
 using JetBrains.Annotations;
 using BenchmarkDotNet.Extensions;
+using NotNullAttribute = JetBrains.Annotations.NotNullAttribute;
 
 namespace BenchmarkDotNet.Environments
 {

src/BenchmarkDotNet/Environments/ProcessorBrandStringHelper.cs

@@ -7,6 +7,7 @@
 using BenchmarkDotNet.Portability.Cpu;
 using JetBrains.Annotations;
 using Perfolizer.Horology;
+using NotNullAttribute = JetBrains.Annotations.NotNullAttribute;
 
 namespace BenchmarkDotNet.Environments
 {

src/BenchmarkDotNet/Extensions/CommonExtensions.cs

@@ -42,12 +42,15 @@ public static void AddRange<T>(this HashSet<T> hashSet, IEnumerable<T> collectio
                 hashSet.Add(item);
         }
 
+#if NETSTANDARD
         public static TValue GetValueOrDefault<TKey, TValue>(this IDictionary<TKey, TValue> dictionary, TKey key)
             => dictionary.TryGetValue(key, out var value) ? value : default;
+#endif
 
         public static double Sqr(this double x) => x * x;
         public static double Pow(this double x, double k) => Math.Pow(x, k);
 
+#if NETSTANDARD
         internal static IEnumerable<TItem> DistinctBy<TItem, TValue>(this IEnumerable<TItem> items, Func<TItem, TValue> selector)
             => DistinctBy(items, selector, EqualityComparer<TValue>.Default);
 
@@ -60,6 +63,7 @@ private static IEnumerable<TItem> DistinctBy<TItem, TValue>(this IEnumerable<TIt
                 if (seen.Add(selector(item)))
                     yield return item;
         }
+#endif
 
         internal static void ForEach<T>(this IList<T> source, Action<T> command)
         {

src/BenchmarkDotNet/Extensions/ProcessExtensions.cs

@@ -85,6 +85,9 @@ public static bool TrySetAffinity(
             if (logger == null)
                 throw new ArgumentNullException(nameof(logger));
 
+            if (!RuntimeInformation.IsWindows() && !RuntimeInformation.IsLinux())
+                return false;
+
             try
             {
                 process.ProcessorAffinity = FixAffinity(processorAffinity);
@@ -104,6 +107,9 @@ public static bool TrySetAffinity(
             if (process == null)
                 throw new ArgumentNullException(nameof(process));
 
+            if (!RuntimeInformation.IsWindows() && !RuntimeInformation.IsLinux())
+                return null;
+
             try
             {
                 return process.ProcessorAffinity;

src/BenchmarkDotNet/Helpers/FrameworkVersionHelper.cs

@@ -49,10 +49,14 @@ internal static string MapToReleaseVersion(string servicingVersion)
             if (string.Compare(servicingVersion, "4.8") < 0)
                 return "4.7.2";
 
+            // TODO Add support for .NET Framework 4.8.1
             return "4.8"; // most probably the last major release of Full .NET Framework
         }
 
 
+#if NET6_0_OR_GREATER
+        [System.Runtime.Versioning.SupportedOSPlatform("windows")]
+#endif
         private static int? GetReleaseNumberFromWindowsRegistry()
         {
             using (var baseKey = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry32))
@@ -64,6 +68,9 @@ internal static string MapToReleaseVersion(string servicingVersion)
             }
         }
 
+#if NET6_0_OR_GREATER
+        [System.Runtime.Versioning.SupportedOSPlatform("windows")]
+#endif
         internal static string GetLatestNetDeveloperPackVersion()
         {
             if (!(GetReleaseNumberFromWindowsRegistry() is int releaseNumber))

src/BenchmarkDotNet/Portability/Cpu/MosCpuInfoProvider.cs

@@ -9,9 +9,15 @@ namespace BenchmarkDotNet.Portability.Cpu
 {
     internal static class MosCpuInfoProvider
     {
+#if NET6_0_OR_GREATER
+        [System.Runtime.Versioning.SupportedOSPlatform("windows")]
+#endif
         internal static readonly Lazy<CpuInfo> MosCpuInfo = new Lazy<CpuInfo>(Load);
 
         [NotNull]
+#if NET6_0_OR_GREATER
+        [System.Runtime.Versioning.SupportedOSPlatform("windows")]
+#endif
         private static CpuInfo Load()
         {
             var processorModelNames = new HashSet<string>();

src/BenchmarkDotNet/Portability/Cpu/SysctlCpuInfoParser.cs

@@ -3,6 +3,7 @@
 using BenchmarkDotNet.Helpers;
 using JetBrains.Annotations;
 using BenchmarkDotNet.Extensions;
+using NotNullAttribute = JetBrains.Annotations.NotNullAttribute;
 
 namespace BenchmarkDotNet.Portability.Cpu
 {