Code cleanups and improvements

- Make use of new UnixFileMode, always one native method we need to maintain less
- Add madness support for it, because new feature of course
- Add optional netstandard target and required compatibility for it, so I can test netf-oriented changes easier

ArchiSteamFarm.CustomPlugins.ExamplePlugin/ArchiSteamFarm.CustomPlugins.ExamplePlugin.csproj

@@ -11,7 +11,7 @@
 		<PackageReference Include="System.Composition.AttributedModel" IncludeAssets="compile" />
 	</ItemGroup>
 
-	<ItemGroup Condition="'$(TargetFramework)' == 'net481'">
+	<ItemGroup Condition="'$(TargetFramework)' == 'net481' OR '$(TargetFramework)' == 'netstandard2.1'">
 		<!-- Madness is already included in netf build of ASF, so we don't need to emit it ourselves -->
 		<PackageReference Update="JustArchiNET.Madness" IncludeAssets="compile" />
 

ArchiSteamFarm.CustomPlugins.PeriodicGC/ArchiSteamFarm.CustomPlugins.PeriodicGC.csproj

@@ -9,7 +9,7 @@
 		<PackageReference Include="System.Composition.AttributedModel" IncludeAssets="compile" />
 	</ItemGroup>
 
-	<ItemGroup Condition="'$(TargetFramework)' == 'net481'">
+	<ItemGroup Condition="'$(TargetFramework)' == 'net481' OR '$(TargetFramework)' == 'netstandard2.1'">
 		<!-- Madness is already included in netf build of ASF, so we don't need to emit it ourselves -->
 		<PackageReference Update="JustArchiNET.Madness" IncludeAssets="compile" />
 	</ItemGroup>

ArchiSteamFarm.CustomPlugins.SignInWithSteam/ArchiSteamFarm.CustomPlugins.SignInWithSteam.csproj

@@ -11,11 +11,14 @@
 		<PackageReference Include="System.Composition.AttributedModel" IncludeAssets="compile" />
 	</ItemGroup>
 
-	<ItemGroup Condition="'$(TargetFramework)' == 'net481'">
+	<ItemGroup Condition="'$(TargetFramework)' == 'net481' OR '$(TargetFramework)' == 'netstandard2.1'">
 		<!-- Madness is already included in netf build of ASF, so we don't need to emit it ourselves -->
 		<PackageReference Update="JustArchiNET.Madness" IncludeAssets="compile" />
 
 		<PackageReference Include="Microsoft.AspNetCore.Mvc.Core" IncludeAssets="compile" />
+	</ItemGroup>
+
+	<ItemGroup Condition="'$(TargetFramework)' == 'net481'">
 		<Reference Include="System.Net.Http" HintPath="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.8.1\System.Net.Http.dll" />
 	</ItemGroup>
 

ArchiSteamFarm.OfficialPlugins.ItemsMatcher/ArchiSteamFarm.OfficialPlugins.ItemsMatcher.csproj

@@ -13,10 +13,12 @@
 		<PackageReference Include="System.Linq.Async" IncludeAssets="compile" />
 	</ItemGroup>
 
-	<ItemGroup Condition="'$(TargetFramework)' == 'net481'">
+	<ItemGroup Condition="'$(TargetFramework)' == 'net481' OR '$(TargetFramework)' == 'netstandard2.1'">
 		<!-- Madness is already included in netf build of ASF, so we don't need to emit it ourselves -->
 		<PackageReference Update="JustArchiNET.Madness" IncludeAssets="compile" />
+	</ItemGroup>
 
+	<ItemGroup Condition="'$(TargetFramework)' == 'net481'">
 		<Reference Include="System.Net.Http" HintPath="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.8.1\System.Net.Http.dll" />
 	</ItemGroup>
 

ArchiSteamFarm.OfficialPlugins.ItemsMatcher/RemoteCommunication.cs

@@ -366,7 +366,7 @@ internal sealed class RemoteCommunication : IAsyncDisposable, IDisposable {
 						LastAnnouncement = DateTime.UtcNow.AddYears(1);
 
 						return;
-#if NETFRAMEWORK
+#if NETFRAMEWORK || NETSTANDARD
 					case (HttpStatusCode) 429:
 #else
 					case HttpStatusCode.TooManyRequests:

ArchiSteamFarm.OfficialPlugins.SteamTokenDumper/ArchiSteamFarm.OfficialPlugins.SteamTokenDumper.csproj

@@ -12,7 +12,7 @@
 		<PackageReference Include="System.Composition.AttributedModel" IncludeAssets="compile" />
 	</ItemGroup>
 
-	<ItemGroup Condition="'$(TargetFramework)' == 'net481'">
+	<ItemGroup Condition="'$(TargetFramework)' == 'net481' OR '$(TargetFramework)' == 'netstandard2.1'">
 		<!-- Madness is already included in netf build of ASF, so we don't need to emit it ourselves -->
 		<PackageReference Update="JustArchiNET.Madness" IncludeAssets="compile" />
 	</ItemGroup>

ArchiSteamFarm.OfficialPlugins.SteamTokenDumper/SteamTokenDumperPlugin.cs

@@ -623,7 +623,7 @@ internal sealed class SteamTokenDumperPlugin : OfficialPlugin, IASF, IBot, IBotC
 						GlobalCache.Reset(true);
 
 						break;
-#if NETFRAMEWORK
+#if NETFRAMEWORK || NETSTANDARD
 					case (HttpStatusCode) 429:
 #else
 					case HttpStatusCode.TooManyRequests:

ArchiSteamFarm.sln.DotSettings

@@ -241,7 +241,6 @@
 	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=PassStringInterpolation/@EntryIndexedValue">SUGGESTION</s:String>
 	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=PatternAlwaysMatches/@EntryIndexedValue">WARNING</s:String>
 	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=PatternAlwaysOfType/@EntryIndexedValue">WARNING</s:String>
-	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=PlaceAssignmentExpressionIntoBlock/@EntryIndexedValue">WARNING</s:String>
 	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=PropertyNotResolved/@EntryIndexedValue">WARNING</s:String>
 	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=RedundantArrayCreationExpression/@EntryIndexedValue">SUGGESTION</s:String>
 	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=RedundantAttributeParentheses/@EntryIndexedValue">SUGGESTION</s:String>

ArchiSteamFarm/ArchiSteamFarm.csproj

@@ -29,7 +29,7 @@
 		<PackageReference Include="System.Security.Cryptography.ProtectedData" />
 	</ItemGroup>
 
-	<ItemGroup Condition="'$(TargetFramework)' == 'net481'">
+	<ItemGroup Condition="'$(TargetFramework)' == 'net481' OR '$(TargetFramework)' == 'netstandard2.1'">
 		<PackageReference Include="Microsoft.AspNetCore.Cors" />
 		<PackageReference Include="Microsoft.AspNetCore.Diagnostics" />
 		<PackageReference Include="Microsoft.AspNetCore.HttpOverrides" />
@@ -39,10 +39,17 @@
 		<PackageReference Include="Microsoft.AspNetCore.WebSockets" />
 		<PackageReference Include="Microsoft.Extensions.Configuration.Json" />
 		<PackageReference Include="Microsoft.Extensions.Logging.Configuration" />
+	</ItemGroup>
+
+	<ItemGroup Condition="'$(TargetFramework)' == 'net481'">
 		<Reference Include="System.Net.Http" HintPath="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.8.1\System.Net.Http.dll" />
 		<Reference Include="System.Security" HintPath="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.8.1\System.Security.dll" />
 	</ItemGroup>
 
+	<ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.1'">
+		<PackageReference Include="System.IO.FileSystem.AccessControl" />
+	</ItemGroup>
+
 	<ItemGroup>
 		<TrimmerRootDescriptor Include="TrimmerRoots.xml" />
 	</ItemGroup>

ArchiSteamFarm/Core/ASF.cs

@@ -1048,7 +1048,8 @@ public static class ASF {
 					return false;
 				}
 
-				if (!Directory.Exists(directory)) {
+				// ReSharper disable once RedundantSuppressNullableWarningExpression - required for .NET Framework
+				if (!Directory.Exists(directory!)) {
 					// ReSharper disable once RedundantSuppressNullableWarningExpression - required for .NET Framework
 					Directory.CreateDirectory(directory!);
 				}

ArchiSteamFarm/Core/GeneratedRegexes.cs

@@ -30,7 +30,7 @@ internal static partial class GeneratedRegexes {
 	private const string DigitsPattern = @"\d+";
 	private const string NonAsciiPattern = @"[^\u0000-\u007F]+";
 
-#if NETFRAMEWORK
+#if NETFRAMEWORK || NETSTANDARD
 	internal static Regex CdKey() => new(CdKeyPattern, DefaultOptions);
 	internal static Regex Decimal() => new(DecimalPattern, DefaultOptions);
 	internal static Regex Digits() => new(DigitsPattern, DefaultOptions);

ArchiSteamFarm/Core/NativeMethods.cs

@@ -26,48 +26,22 @@ using System.Runtime.Versioning;
 namespace ArchiSteamFarm.Core;
 
 internal static partial class NativeMethods {
-	[SupportedOSPlatform("Windows")]
-	internal const EExecutionState AwakeExecutionState = EExecutionState.SystemRequired | EExecutionState.AwayModeRequired | EExecutionState.Continuous;
-
-	[SupportedOSPlatform("Windows")]
-	internal const uint EnableQuickEditMode = 0x0040;
-
-	[SupportedOSPlatform("Windows")]
-	internal const byte ShowWindowMinimize = 6;
-
-	[SupportedOSPlatform("Windows")]
-	internal const sbyte StandardInputHandle = -10;
-
-	[DefaultDllImportSearchPaths(DllImportSearchPath.System32)]
-	[SupportedOSPlatform("FreeBSD")]
-	[SupportedOSPlatform("Linux")]
-	[SupportedOSPlatform("MacOS")]
-#if NETFRAMEWORK
-#pragma warning disable CA2101 // False positive, we can't use unicode charset on Unix, and it uses UTF-8 by default anyway
-	[DllImport("libc", EntryPoint = "chmod", SetLastError = true)]
-	internal static extern int Chmod(string path, int mode);
-#pragma warning restore CA2101 // False positive, we can't use unicode charset on Unix, and it uses UTF-8 by default anyway
-#else
-	[LibraryImport("libc", EntryPoint = "chmod", SetLastError = true, StringMarshalling = StringMarshalling.Utf8)]
-	internal static partial int Chmod(string path, int mode);
-#endif
-
 	[DefaultDllImportSearchPaths(DllImportSearchPath.System32)]
 	[SupportedOSPlatform("Windows")]
 	[return: MarshalAs(UnmanagedType.Bool)]
-#if NETFRAMEWORK
+#if NETFRAMEWORK || NETSTANDARD
 	[DllImport("kernel32.dll")]
-	internal static extern bool GetConsoleMode(nint hConsoleHandle, out uint lpMode);
+	internal static extern bool GetConsoleMode(nint hConsoleHandle, out EConsoleMode lpMode);
 #else
 	[LibraryImport("kernel32.dll")]
-	internal static partial bool GetConsoleMode(nint hConsoleHandle, out uint lpMode);
+	internal static partial bool GetConsoleMode(nint hConsoleHandle, out EConsoleMode lpMode);
 #endif
 
 	[DefaultDllImportSearchPaths(DllImportSearchPath.System32)]
 	[SupportedOSPlatform("FreeBSD")]
 	[SupportedOSPlatform("Linux")]
 	[SupportedOSPlatform("MacOS")]
-#if NETFRAMEWORK
+#if NETFRAMEWORK || NETSTANDARD
 	[DllImport("libc", EntryPoint = "geteuid", SetLastError = true)]
 	internal static extern uint GetEuid();
 #else
@@ -77,28 +51,28 @@ internal static partial class NativeMethods {
 
 	[DefaultDllImportSearchPaths(DllImportSearchPath.System32)]
 	[SupportedOSPlatform("Windows")]
-#if NETFRAMEWORK
+#if NETFRAMEWORK || NETSTANDARD
 	[DllImport("kernel32.dll")]
-	internal static extern nint GetStdHandle(int nStdHandle);
+	internal static extern nint GetStdHandle(EStandardHandle nStdHandle);
 #else
 	[LibraryImport("kernel32.dll")]
-	internal static partial nint GetStdHandle(int nStdHandle);
+	internal static partial nint GetStdHandle(EStandardHandle nStdHandle);
 #endif
 
 	[DefaultDllImportSearchPaths(DllImportSearchPath.System32)]
 	[SupportedOSPlatform("Windows")]
 	[return: MarshalAs(UnmanagedType.Bool)]
-#if NETFRAMEWORK
+#if NETFRAMEWORK || NETSTANDARD
 	[DllImport("kernel32.dll")]
-	internal static extern bool SetConsoleMode(nint hConsoleHandle, uint dwMode);
+	internal static extern bool SetConsoleMode(nint hConsoleHandle, EConsoleMode dwMode);
 #else
 	[LibraryImport("kernel32.dll")]
-	internal static partial bool SetConsoleMode(nint hConsoleHandle, uint dwMode);
+	internal static partial bool SetConsoleMode(nint hConsoleHandle, EConsoleMode dwMode);
 #endif
 
 	[DefaultDllImportSearchPaths(DllImportSearchPath.System32)]
 	[SupportedOSPlatform("Windows")]
-#if NETFRAMEWORK
+#if NETFRAMEWORK || NETSTANDARD
 	[DllImport("kernel32.dll")]
 	internal static extern EExecutionState SetThreadExecutionState(EExecutionState executionState);
 #else
@@ -109,20 +83,37 @@ internal static partial class NativeMethods {
 	[DefaultDllImportSearchPaths(DllImportSearchPath.System32)]
 	[SupportedOSPlatform("Windows")]
 	[return: MarshalAs(UnmanagedType.Bool)]
-#if NETFRAMEWORK
+#if NETFRAMEWORK || NETSTANDARD
 	[DllImport("user32.dll")]
-	internal static extern void ShowWindow(nint hWnd, int nCmdShow);
+	internal static extern void ShowWindow(nint hWnd, EShowWindow nCmdShow);
 #else
 	[LibraryImport("user32.dll")]
-	internal static partial void ShowWindow(nint hWnd, int nCmdShow);
+	internal static partial void ShowWindow(nint hWnd, EShowWindow nCmdShow);
 #endif
 
+	[Flags]
+	[SupportedOSPlatform("Windows")]
+	internal enum EConsoleMode : uint {
+		EnableQuickEditMode = 0x0040
+	}
+
 	[Flags]
 	[SupportedOSPlatform("Windows")]
 	internal enum EExecutionState : uint {
 		None = 0,
 		SystemRequired = 0x00000001,
 		AwayModeRequired = 0x00000040,
-		Continuous = 0x80000000
+		Continuous = 0x80000000,
+		Awake = SystemRequired | AwayModeRequired | Continuous
+	}
+
+	[SupportedOSPlatform("Windows")]
+	internal enum EShowWindow : uint {
+		Minimize = 6
+	}
+
+	[SupportedOSPlatform("Windows")]
+	internal enum EStandardHandle {
+		Input = -10
 	}
 }

ArchiSteamFarm/Core/OS.cs

@@ -43,7 +43,7 @@ internal static class OS {
 	internal static readonly string ProcessFileName = Environment.ProcessPath ?? throw new InvalidOperationException(nameof(ProcessFileName));
 
 	internal static DateTime ProcessStartTime {
-#if NETFRAMEWORK
+#if NETFRAMEWORK || NETSTANDARD
 		get => RuntimeMadness.ProcessStartTime.ToUniversalTime();
 #else
 		get {
@@ -67,7 +67,7 @@ internal static class OS {
 				framework = "Unknown Framework";
 			}
 
-#if NETFRAMEWORK
+#if NETFRAMEWORK || NETSTANDARD
 			string runtime = RuntimeInformation.OSArchitecture.ToString();
 #else
 			string runtime = RuntimeInformation.RuntimeIdentifier.Trim();
@@ -195,30 +195,6 @@ internal static class OS {
 		return true;
 	}
 
-	[SupportedOSPlatform("FreeBSD")]
-	[SupportedOSPlatform("Linux")]
-	[SupportedOSPlatform("MacOS")]
-	internal static void UnixSetFileAccess(string path, EUnixPermission permission) {
-		if (string.IsNullOrEmpty(path)) {
-			throw new ArgumentNullException(nameof(path));
-		}
-
-		if (!OperatingSystem.IsFreeBSD() && !OperatingSystem.IsLinux() && !OperatingSystem.IsMacOS()) {
-			throw new PlatformNotSupportedException();
-		}
-
-		if (!File.Exists(path) && !Directory.Exists(path)) {
-			ASF.ArchiLogger.LogGenericError(string.Format(CultureInfo.CurrentCulture, Strings.WarningFailedWithError, $"!{nameof(path)}"));
-
-			return;
-		}
-
-		// Chmod() returns 0 on success, -1 on failure
-		if (NativeMethods.Chmod(path, (int) permission) != 0) {
-			ASF.ArchiLogger.LogGenericError(string.Format(CultureInfo.CurrentCulture, Strings.WarningFailedWithError, Marshal.GetLastWin32Error()));
-		}
-	}
-
 	internal static void UnregisterProcess() {
 		if (SingleInstance == null) {
 			return;
@@ -237,7 +213,7 @@ internal static class OS {
 		}
 
 		if (SharedInfo.BuildInfo.Variant.EndsWith("-netf", StringComparison.Ordinal)) {
-#if NETFRAMEWORK
+#if NETFRAMEWORK || NETSTANDARD
 			// All Windows variants (7+) have valid .NET Core build
 			if (OperatingSystem.IsWindows()) {
 				return false;
@@ -300,15 +276,15 @@ internal static class OS {
 			throw new PlatformNotSupportedException();
 		}
 
-		nint consoleHandle = NativeMethods.GetStdHandle(NativeMethods.StandardInputHandle);
+		nint consoleHandle = NativeMethods.GetStdHandle(NativeMethods.EStandardHandle.Input);
 
-		if (!NativeMethods.GetConsoleMode(consoleHandle, out uint consoleMode)) {
+		if (!NativeMethods.GetConsoleMode(consoleHandle, out NativeMethods.EConsoleMode consoleMode)) {
 			ASF.ArchiLogger.LogGenericError(Strings.WarningFailed);
 
 			return;
 		}
 
-		consoleMode &= ~NativeMethods.EnableQuickEditMode;
+		consoleMode &= ~NativeMethods.EConsoleMode.EnableQuickEditMode;
 
 		if (!NativeMethods.SetConsoleMode(consoleHandle, consoleMode)) {
 			ASF.ArchiLogger.LogGenericError(Strings.WarningFailed);
@@ -324,7 +300,7 @@ internal static class OS {
 		// This function calls unmanaged API in order to tell Windows OS that it should not enter sleep state while the program is running
 		// If user wishes to enter sleep mode, then he should use ShutdownOnFarmingFinished or manage ASF process with third-party tool or script
 		// See https://docs.microsoft.com/windows/win32/api/winbase/nf-winbase-setthreadexecutionstate for more details
-		NativeMethods.EExecutionState result = NativeMethods.SetThreadExecutionState(NativeMethods.AwakeExecutionState);
+		NativeMethods.EExecutionState result = NativeMethods.SetThreadExecutionState(NativeMethods.EExecutionState.Awake);
 
 		// SetThreadExecutionState() returns NULL on failure, which is mapped to 0 (EExecutionState.None) in our case
 		if (result == NativeMethods.EExecutionState.None) {
@@ -340,23 +316,6 @@ internal static class OS {
 
 		using Process process = Process.GetCurrentProcess();
 
-		NativeMethods.ShowWindow(process.MainWindowHandle, NativeMethods.ShowWindowMinimize);
-	}
-
-	[Flags]
-	[SupportedOSPlatform("FreeBSD")]
-	[SupportedOSPlatform("Linux")]
-	[SupportedOSPlatform("MacOS")]
-	internal enum EUnixPermission : ushort {
-		OtherExecute = 0x1,
-		OtherWrite = 0x2,
-		OtherRead = 0x4,
-		GroupExecute = 0x8,
-		GroupWrite = 0x10,
-		GroupRead = 0x20,
-		UserExecute = 0x40,
-		UserWrite = 0x80,
-		UserRead = 0x100,
-		Combined777 = UserRead | UserWrite | UserExecute | GroupRead | GroupWrite | GroupExecute | OtherRead | OtherWrite | OtherExecute
+		NativeMethods.ShowWindow(process.MainWindowHandle, NativeMethods.EShowWindow.Minimize);
 	}
 }

ArchiSteamFarm/Core/Utilities.cs

@@ -85,7 +85,7 @@ public static class Utilities {
 
 		CookieCollection cookies = cookieContainer.GetCookies(uri);
 
-#if NETFRAMEWORK
+#if NETFRAMEWORK || NETSTANDARD
 		return cookies.Count > 0 ? (from Cookie cookie in cookies where cookie.Name == name select cookie.Value).FirstOrDefault() : null;
 #else
 		return cookies.Count > 0 ? cookies.FirstOrDefault(cookie => cookie.Name == name)?.Value : null;

ArchiSteamFarm/Helpers/CrossProcessFileBasedSemaphore.cs

@@ -179,12 +179,12 @@ internal sealed class CrossProcessFileBasedSemaphore : IAsyncDisposable, ICrossP
 			return;
 		}
 
-		if (!Directory.Exists(directoryPath)) {
-			Directory.CreateDirectory(directoryPath);
+		// ReSharper disable once RedundantSuppressNullableWarningExpression - required for .NET Framework
+		if (!Directory.Exists(directoryPath!)) {
+			// ReSharper disable once RedundantSuppressNullableWarningExpression - required for .NET Framework
+			DirectoryInfo directoryInfo = Directory.CreateDirectory(directoryPath!);
 
 			if (OperatingSystem.IsWindows()) {
-				DirectoryInfo directoryInfo = new(directoryPath);
-
 				try {
 					DirectorySecurity directorySecurity = new(directoryPath, AccessControlSections.All);
 
@@ -194,17 +194,16 @@ internal sealed class CrossProcessFileBasedSemaphore : IAsyncDisposable, ICrossP
 					ASF.ArchiLogger.LogGenericDebuggingException(e);
 				}
 			} else if (OperatingSystem.IsFreeBSD() || OperatingSystem.IsLinux() || OperatingSystem.IsMacOS()) {
-				// ReSharper disable once RedundantSuppressNullableWarningExpression - required for .NET Framework
-				OS.UnixSetFileAccess(directoryPath!, OS.EUnixPermission.Combined777);
+				directoryInfo.UnixFileMode |= UnixFileMode.UserRead | UnixFileMode.UserWrite | UnixFileMode.UserExecute | UnixFileMode.GroupRead | UnixFileMode.GroupWrite | UnixFileMode.GroupExecute | UnixFileMode.OtherRead | UnixFileMode.OtherWrite | UnixFileMode.OtherExecute;
 			}
 		}
 
 		try {
 			new FileStream(FilePath, FileMode.CreateNew).Dispose();
 
-			if (OperatingSystem.IsWindows()) {
 			FileInfo fileInfo = new(FilePath);
 
+			if (OperatingSystem.IsWindows()) {
 				try {
 					FileSecurity fileSecurity = new(FilePath, AccessControlSections.All);
 
@@ -214,7 +213,7 @@ internal sealed class CrossProcessFileBasedSemaphore : IAsyncDisposable, ICrossP
 					ASF.ArchiLogger.LogGenericDebuggingException(e);
 				}
 			} else if (OperatingSystem.IsFreeBSD() || OperatingSystem.IsLinux() || OperatingSystem.IsMacOS()) {
-				OS.UnixSetFileAccess(FilePath, OS.EUnixPermission.Combined777);
+				fileInfo.UnixFileMode |= UnixFileMode.UserRead | UnixFileMode.UserWrite | UnixFileMode.UserExecute | UnixFileMode.GroupRead | UnixFileMode.GroupWrite | UnixFileMode.GroupExecute | UnixFileMode.OtherRead | UnixFileMode.OtherWrite | UnixFileMode.OtherExecute;
 			}
 		} catch (IOException) {
 			// Ignored, if the file was already created in the meantime by another instance, this is fine

ArchiSteamFarm/IPC/ArchiKestrel.cs

@@ -19,7 +19,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#if NETFRAMEWORK
+#if NETFRAMEWORK || NETSTANDARD
 using IHost = Microsoft.AspNetCore.Hosting.IWebHost;
 using HostBuilder = Microsoft.AspNetCore.Hosting.WebHostBuilder;
 #endif

ArchiSteamFarm/IPC/Integration/ApiAuthenticationMiddleware.cs

@@ -19,7 +19,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#if NETFRAMEWORK
+#if NETFRAMEWORK || NETSTANDARD
 using MvcNewtonsoftJsonOptions = Microsoft.AspNetCore.Mvc.MvcJsonOptions;
 #endif
 using System;

ArchiSteamFarm/IPC/Startup.cs

@@ -19,7 +19,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#if NETFRAMEWORK
+#if NETFRAMEWORK || NETSTANDARD
 using Microsoft.AspNetCore.Mvc;
 using Newtonsoft.Json.Converters;
 using IWebHostEnvironment = Microsoft.AspNetCore.Hosting.IHostingEnvironment;
@@ -134,7 +134,7 @@ internal sealed class Startup {
 		);
 
 		// Use routing for our API controllers, this should be called once we're done with all the static files mess
-#if !NETFRAMEWORK
+#if !NETFRAMEWORK && !NETSTANDARD
 		app.UseRouting();
 #endif
 
@@ -153,7 +153,7 @@ internal sealed class Startup {
 		app.UseWebSockets();
 
 		// Finally register proper API endpoints once we're done with routing
-#if NETFRAMEWORK
+#if NETFRAMEWORK || NETSTANDARD
 		app.UseMvcWithDefaultRoute();
 #else
 		app.UseEndpoints(static endpoints => endpoints.MapControllers());
@@ -313,7 +313,7 @@ internal sealed class Startup {
 
 		mvc.AddControllersAsServices();
 
-#if NETFRAMEWORK
+#if NETFRAMEWORK || NETSTANDARD
 		// Use latest compatibility version for MVC
 		mvc.SetCompatibilityVersion(CompatibilityVersion.Latest);
 
@@ -333,7 +333,7 @@ internal sealed class Startup {
 					options.SerializerSettings.Formatting = Formatting.Indented;
 				}
 
-#if NETFRAMEWORK
+#if NETFRAMEWORK || NETSTANDARD
 				// .NET Framework serializes Version as object by default, serialize it as string just like .NET Core
 				options.SerializerSettings.Converters.Add(new VersionConverter());
 #endif

ArchiSteamFarm/IPC/WebUtilities.cs

@@ -19,7 +19,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#if NETFRAMEWORK
+#if NETFRAMEWORK || NETSTANDARD
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.Extensions.DependencyInjection;
 #endif
@@ -35,7 +35,7 @@ using Newtonsoft.Json;
 namespace ArchiSteamFarm.IPC;
 
 internal static class WebUtilities {
-#if NETFRAMEWORK
+#if NETFRAMEWORK || NETSTANDARD
 	internal static IMvcCoreBuilder AddControllers(this IServiceCollection services) {
 		ArgumentNullException.ThrowIfNull(services);
 

ArchiSteamFarm/Program.cs

@@ -43,7 +43,7 @@ using Newtonsoft.Json;
 using NLog;
 using NLog.Targets;
 using SteamKit2;
-#if !NETFRAMEWORK
+#if !NETFRAMEWORK && !NETSTANDARD
 using System.Net.Quic;
 #endif
 
@@ -59,13 +59,13 @@ internal static class Program {
 	internal static bool ShutdownSequenceInitialized { get; private set; }
 	internal static bool SteamParentalGeneration { get; private set; } = true;
 
-#if !NETFRAMEWORK
+#if !NETFRAMEWORK && !NETSTANDARD
 	private static readonly Dictionary<PosixSignal, PosixSignalRegistration> RegisteredPosixSignals = new();
 #endif
 
 	private static readonly TaskCompletionSource<byte> ShutdownResetEvent = new();
 
-#if !NETFRAMEWORK
+#if !NETFRAMEWORK && !NETSTANDARD
 	private static readonly ImmutableHashSet<PosixSignal> SupportedPosixSignals = ImmutableHashSet.Create(PosixSignal.SIGINT, PosixSignal.SIGTERM);
 #endif
 
@@ -193,7 +193,7 @@ internal static class Program {
 		AppDomain.CurrentDomain.UnhandledException += OnUnhandledException;
 		TaskScheduler.UnobservedTaskException += OnUnobservedTaskException;
 
-#if NETFRAMEWORK
+#if NETFRAMEWORK || NETSTANDARD
 		RuntimeMadness.Initialize();
 #else
 		if (OperatingSystem.IsFreeBSD() || OperatingSystem.IsLinux() || OperatingSystem.IsMacOS()) {
@@ -465,7 +465,7 @@ internal static class Program {
 
 		ShutdownSequenceInitialized = true;
 
-#if !NETFRAMEWORK
+#if !NETFRAMEWORK && !NETSTANDARD
 		if (OperatingSystem.IsFreeBSD() || OperatingSystem.IsLinux() || OperatingSystem.IsMacOS()) {
 			// Unregister from registered signals
 			foreach (PosixSignalRegistration registration in RegisteredPosixSignals.Values) {
@@ -510,7 +510,7 @@ internal static class Program {
 
 	private static async void OnCancelKeyPress(object? sender, ConsoleCancelEventArgs e) => await Exit(130).ConfigureAwait(false);
 
-#if !NETFRAMEWORK
+#if !NETFRAMEWORK && !NETSTANDARD
 	private static async void OnPosixSignal(PosixSignalContext signal) {
 		ArgumentNullException.ThrowIfNull(signal);
 

ArchiSteamFarm/Web/WebBrowser.cs

@@ -65,7 +65,7 @@ public sealed class WebBrowser : IDisposable {
 		HttpClientHandler = new HttpClientHandler {
 			AllowAutoRedirect = false, // This must be false if we want to handle custom redirection schemes such as "steammobile://"
 
-#if NETFRAMEWORK
+#if NETFRAMEWORK || NETSTANDARD
 			AutomaticDecompression = DecompressionMethods.Deflate | DecompressionMethods.GZip,
 #else
 			AutomaticDecompression = DecompressionMethods.All,
@@ -85,7 +85,7 @@ public sealed class WebBrowser : IDisposable {
 			}
 		}
 
-#if NETFRAMEWORK
+#if NETFRAMEWORK || NETSTANDARD
 		if (!RuntimeMadness.IsRunningOnMono) {
 			HttpClientHandler.MaxConnectionsPerServer = MaxConnections;
 		}
@@ -106,7 +106,7 @@ public sealed class WebBrowser : IDisposable {
 		byte connectionTimeout = ASF.GlobalConfig?.ConnectionTimeout ?? GlobalConfig.DefaultConnectionTimeout;
 
 		HttpClient result = new(HttpClientHandler, false) {
-#if !NETFRAMEWORK
+#if !NETFRAMEWORK && !NETSTANDARD
 			DefaultRequestVersion = HttpVersion.Version30,
 #endif
 			Timeout = TimeSpan.FromSeconds(extendedTimeout ? ExtendedTimeout : connectionTimeout)
@@ -662,7 +662,7 @@ public sealed class WebBrowser : IDisposable {
 					using StreamReader streamReader = new(response.Content);
 
 #pragma warning disable CA2000 // False positive, we're actually wrapping it in the using clause below exactly for that purpose
-					JsonReader jsonReader = new JsonTextReader(streamReader);
+					JsonTextReader jsonReader = new(streamReader);
 #pragma warning restore CA2000 // False positive, we're actually wrapping it in the using clause below exactly for that purpose
 
 					await using (jsonReader.ConfigureAwait(false)) {
@@ -766,7 +766,7 @@ public sealed class WebBrowser : IDisposable {
 		ServicePointManager.Expect100Continue = false;
 
 		// Reuse ports if possible
-#if NETFRAMEWORK
+#if NETFRAMEWORK || NETSTANDARD
 		if (!RuntimeMadness.IsRunningOnMono) {
 			ServicePointManager.ReusePort = true;
 		}
@@ -801,7 +801,7 @@ public sealed class WebBrowser : IDisposable {
 
 		while (true) {
 			using (HttpRequestMessage requestMessage = new(httpMethod, request)) {
-#if !NETFRAMEWORK
+#if !NETFRAMEWORK && !NETSTANDARD
 				requestMessage.Version = HttpClient.DefaultRequestVersion;
 #endif
 

ArchiSteamFarm/Web/WebBrowserUtilities.cs

@@ -59,7 +59,7 @@ internal static class WebBrowserUtilities {
 	private static (Stream CompressionInput, string ContentEncoding) GetBestSupportedCompressionMethod(Stream output) {
 		ArgumentNullException.ThrowIfNull(output);
 
-#if NETFRAMEWORK
+#if NETFRAMEWORK || NETSTANDARD
 		return (new GZipStream(output, CompressionLevel.Optimal, true), "gzip");
 #else
 		return (new BrotliStream(output, CompressionLevel.SmallestSize, true), "br");

Directory.Build.props

@@ -29,18 +29,19 @@
 		<RepositoryUrl>$(PackageProjectUrl).git</RepositoryUrl>
 		<RollForward>LatestMajor</RollForward>
 		<RuntimeIdentifiers>linux-arm;linux-arm64;linux-x64;osx-arm64;osx-x64;win-x64</RuntimeIdentifiers>
+		<TargetFrameworks>net7.0</TargetFrameworks>
 		<TargetLatestRuntimePatch>true</TargetLatestRuntimePatch>
 	</PropertyGroup>
 
 	<PropertyGroup Condition="'$(OS)' == 'Windows_NT' OR '$(ASFNetFramework)' != ''">
-		<TargetFrameworks>net7.0;net481</TargetFrameworks>
+		<TargetFrameworks>$(TargetFrameworks);net481</TargetFrameworks>
 	</PropertyGroup>
 
-	<PropertyGroup Condition="'$(OS)' != 'Windows_NT' AND '$(ASFNetFramework)' == ''">
-		<TargetFramework>net7.0</TargetFramework>
+	<PropertyGroup Condition="'$(ASFNetStandard)' != ''">
+		<TargetFrameworks>$(TargetFrameworks);netstandard2.1</TargetFrameworks>
 	</PropertyGroup>
 
-	<ItemGroup Condition="'$(TargetFramework)' == 'net481'">
+	<ItemGroup Condition="'$(TargetFramework)' == 'net481' OR '$(TargetFramework)' == 'netstandard2.1'">
 		<PackageReference Include="JustArchiNET.Madness" />
 		<PackageReference Include="TA.System.Runtime.CompilerServices.RuntimeHelpers.GetSubArray" />
 
@@ -48,9 +49,13 @@
 		<Using Include="JustArchiNET.Madness.ArgumentNullExceptionMadness.ArgumentNullException" Alias="ArgumentNullException" />
 		<Using Include="JustArchiNET.Madness.ArrayMadness.Array" Alias="Array" />
 		<Using Include="JustArchiNET.Madness.ConvertMadness.Convert" Alias="Convert" />
+		<Using Include="JustArchiNET.Madness.DirectoryInfoMadness.DirectoryInfo" Alias="DirectoryInfo" />
+		<Using Include="JustArchiNET.Madness.DirectoryMadness.Directory" Alias="Directory" />
 		<Using Include="JustArchiNET.Madness.EnumMadness.Enum" Alias="Enum" />
 		<Using Include="JustArchiNET.Madness.EnvironmentMadness.Environment" Alias="Environment" />
+		<Using Include="JustArchiNET.Madness.FileInfoMadness.FileInfo" Alias="FileInfo" />
 		<Using Include="JustArchiNET.Madness.FileMadness.File" Alias="File" />
+		<Using Include="JustArchiNET.Madness.FileMadness.UnixFileMode" Alias="UnixFileMode" />
 		<Using Include="JustArchiNET.Madness.HashCodeMadness.HashCode" Alias="HashCode" />
 		<Using Include="JustArchiNET.Madness.HMACSHA1Madness.HMACSHA1" Alias="HMACSHA1" />
 		<Using Include="JustArchiNET.Madness.HttpRequestExceptionMadness.HttpRequestException" Alias="HttpRequestException" />
@@ -63,6 +68,11 @@
 		<Using Include="JustArchiNET.Madness.StringMadness.String" Alias="String" />
 	</ItemGroup>
 
+	<ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.1'">
+		<Using Include="JustArchiNET.Madness.NewtonsoftJsonMadness.JsonTextReader" Alias="JsonTextReader" />
+		<Using Include="JustArchiNET.Madness.NewtonsoftJsonMadness.JsonTextWriter" Alias="JsonTextWriter" />
+	</ItemGroup>
+
 	<PropertyGroup Condition="'$(ASFVariant)' != ''">
 		<DefineConstants>$(DefineConstants);ASF_VARIANT_$(ASFVariant.Replace('-', '_').ToUpperInvariant())</DefineConstants>
 	</PropertyGroup>

Directory.Packages.props

@@ -26,8 +26,8 @@
 		<PackageVersion Include="System.Security.Cryptography.ProtectedData" Version="7.0.0" />
 	</ItemGroup>
 
-	<ItemGroup Condition="'$(TargetFramework)' == 'net481'">
-		<PackageVersion Include="JustArchiNET.Madness" Version="3.10.0" />
+	<ItemGroup Condition="'$(TargetFramework)' == 'net481' OR '$(TargetFramework)' == 'netstandard2.1'">
+		<PackageVersion Include="JustArchiNET.Madness" Version="3.11.0" />
 		<PackageVersion Include="Microsoft.AspNetCore.Cors" Version="2.2.0" />
 		<PackageVersion Include="Microsoft.AspNetCore.Diagnostics" Version="2.2.0" />
 		<PackageVersion Include="Microsoft.AspNetCore.HttpOverrides" Version="2.2.0" />
@@ -40,4 +40,8 @@
 		<PackageVersion Include="Microsoft.Extensions.Logging.Configuration" Version="3.1.32" />
 		<PackageVersion Include="TA.System.Runtime.CompilerServices.RuntimeHelpers.GetSubArray" Version="1.0.1" />
 	</ItemGroup>
+
+	<ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.1'">
+		<PackageVersion Include="System.IO.FileSystem.AccessControl" Version="5.0.0" />
+	</ItemGroup>
 </Project>