diff --git a/ArchiSteamFarm/Core/NativeMethods.cs b/ArchiSteamFarm/Core/NativeMethods.cs
new file mode 100644
index 000000000..2912b4645
--- /dev/null
+++ b/ArchiSteamFarm/Core/NativeMethods.cs
@@ -0,0 +1,84 @@
+//     _                _      _  ____   _                           _____
+//    / \    _ __  ___ | |__  (_)/ ___| | |_  ___   __ _  _ __ ___  |  ___|__ _  _ __  _ __ ___
+//   / _ \  | '__|/ __|| '_ \ | |\___ \ | __|/ _ \ / _` || '_ ` _ \ | |_  / _` || '__|| '_ ` _ \
+//  / ___ \ | |  | (__ | | | || | ___) || |_|  __/| (_| || | | | | ||  _|| (_| || |   | | | | | |
+// /_/   \_\|_|   \___||_| |_||_||____/  \__|\___| \__,_||_| |_| |_||_|   \__,_||_|   |_| |_| |_|
+// |
+// Copyright 2015-2022 Łukasz "JustArchi" Domeradzki
+// Contact: JustArchi@JustArchi.net
+// |
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// |
+// http://www.apache.org/licenses/LICENSE-2.0
+// |
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+using System;
+using System.Runtime.InteropServices;
+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 sbyte StandardInputHandle = -10;
+
+#pragma warning disable CA2101 // False positive, we can't use unicode charset on Unix, and it uses UTF-8 by default anyway
+	[DefaultDllImportSearchPaths(DllImportSearchPath.System32)]
+	[LibraryImport("libc", EntryPoint = "chmod", SetLastError = true, StringMarshalling = StringMarshalling.Utf8)]
+	[SupportedOSPlatform("FreeBSD")]
+	[SupportedOSPlatform("Linux")]
+	[SupportedOSPlatform("MacOS")]
+	internal static partial 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
+
+	[DefaultDllImportSearchPaths(DllImportSearchPath.System32)]
+	[LibraryImport("kernel32.dll")]
+	[SupportedOSPlatform("Windows")]
+	[return: MarshalAs(UnmanagedType.Bool)]
+	internal static partial bool GetConsoleMode(IntPtr hConsoleHandle, out uint lpMode);
+
+	[DefaultDllImportSearchPaths(DllImportSearchPath.System32)]
+	[LibraryImport("libc", EntryPoint = "geteuid", SetLastError = true)]
+	[SupportedOSPlatform("FreeBSD")]
+	[SupportedOSPlatform("Linux")]
+	[SupportedOSPlatform("MacOS")]
+	internal static partial uint GetEuid();
+
+	[DefaultDllImportSearchPaths(DllImportSearchPath.System32)]
+	[LibraryImport("kernel32.dll")]
+	[SupportedOSPlatform("Windows")]
+	internal static partial IntPtr GetStdHandle(int nStdHandle);
+
+	[DefaultDllImportSearchPaths(DllImportSearchPath.System32)]
+	[LibraryImport("kernel32.dll")]
+	[SupportedOSPlatform("Windows")]
+	[return: MarshalAs(UnmanagedType.Bool)]
+	internal static partial bool SetConsoleMode(IntPtr hConsoleHandle, uint dwMode);
+
+	[DefaultDllImportSearchPaths(DllImportSearchPath.System32)]
+	[LibraryImport("kernel32.dll")]
+	[SupportedOSPlatform("Windows")]
+	internal static partial EExecutionState SetThreadExecutionState(EExecutionState executionState);
+
+	[Flags]
+	[SupportedOSPlatform("Windows")]
+	internal enum EExecutionState : uint {
+		None = 0,
+		SystemRequired = 0x00000001,
+		AwayModeRequired = 0x00000040,
+		Continuous = 0x80000000
+	}
+}
diff --git a/ArchiSteamFarm/Core/OS.cs b/ArchiSteamFarm/Core/OS.cs
index 63721ca56..2f9378eb1 100644
--- a/ArchiSteamFarm/Core/OS.cs
+++ b/ArchiSteamFarm/Core/OS.cs
@@ -148,7 +148,7 @@ internal static class OS {
 		}
 
 		if (OperatingSystem.IsFreeBSD() || OperatingSystem.IsLinux() || OperatingSystem.IsMacOS()) {
-			return NativeMethods.GetEUID() == 0;
+			return NativeMethods.GetEuid() == 0;
 		}
 
 		// We can't determine whether user is running as root or not, so fallback to that not happening
@@ -344,60 +344,4 @@ internal static class OS {
 		UserRead = 0x100,
 		Combined777 = UserRead | UserWrite | UserExecute | GroupRead | GroupWrite | GroupExecute | OtherRead | OtherWrite | OtherExecute
 	}
-
-	private static 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 sbyte StandardInputHandle = -10;
-
-#pragma warning disable CA2101 // False positive, we can't use unicode charset on Unix, and it uses UTF-8 by default anyway
-		[DefaultDllImportSearchPaths(DllImportSearchPath.System32)]
-		[DllImport("libc", EntryPoint = "chmod", SetLastError = true)]
-		[SupportedOSPlatform("FreeBSD")]
-		[SupportedOSPlatform("Linux")]
-		[SupportedOSPlatform("MacOS")]
-		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
-
-		[DefaultDllImportSearchPaths(DllImportSearchPath.System32)]
-		[DllImport("kernel32.dll")]
-		[SupportedOSPlatform("Windows")]
-		internal static extern bool GetConsoleMode(IntPtr hConsoleHandle, out uint lpMode);
-
-		[DefaultDllImportSearchPaths(DllImportSearchPath.System32)]
-		[DllImport("libc", EntryPoint = "geteuid", SetLastError = true)]
-		[SupportedOSPlatform("FreeBSD")]
-		[SupportedOSPlatform("Linux")]
-		[SupportedOSPlatform("MacOS")]
-		internal static extern uint GetEUID();
-
-		[DefaultDllImportSearchPaths(DllImportSearchPath.System32)]
-		[DllImport("kernel32.dll")]
-		[SupportedOSPlatform("Windows")]
-		internal static extern IntPtr GetStdHandle(int nStdHandle);
-
-		[DefaultDllImportSearchPaths(DllImportSearchPath.System32)]
-		[DllImport("kernel32.dll")]
-		[SupportedOSPlatform("Windows")]
-		internal static extern bool SetConsoleMode(IntPtr hConsoleHandle, uint dwMode);
-
-		[DefaultDllImportSearchPaths(DllImportSearchPath.System32)]
-		[DllImport("kernel32.dll")]
-		[SupportedOSPlatform("Windows")]
-		internal static extern EExecutionState SetThreadExecutionState(EExecutionState executionState);
-
-		[Flags]
-		[SupportedOSPlatform("Windows")]
-		internal enum EExecutionState : uint {
-			None = 0,
-			SystemRequired = 0x00000001,
-			AwayModeRequired = 0x00000040,
-			Continuous = 0x80000000
-		}
-	}
 }
diff --git a/Directory.Build.props b/Directory.Build.props
index 8db77d912..6e712b830 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -4,6 +4,7 @@
 	</PropertyGroup>
 
 	<PropertyGroup>
+		<AllowUnsafeBlocks>true</AllowUnsafeBlocks>
 		<AnalysisMode>AllEnabledByDefault</AnalysisMode>
 		<ApplicationIcon>../resources/ASF.ico</ApplicationIcon>
 		<Authors>JustArchi</Authors>
@@ -70,7 +71,7 @@
 		<DebugType>none</DebugType>
 		<TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 		<WarningsAsErrors />
-		<WarningsNotAsErrors>CS8002,IL2026,IL2057,IL2072,IL2075,IL2104,SYSLIB1045,SYSLIB1054</WarningsNotAsErrors>
+		<WarningsNotAsErrors>CS8002,IL2026,IL2057,IL2072,IL2075,IL2104,SYSLIB1045</WarningsNotAsErrors>
 	</PropertyGroup>
 
 	<!-- Enable public signing if not part of Visual Studio, which is too stupid to understand what public signing is -->