diff --git a/AutoDark.sln b/AutoDark.sln
new file mode 100644
index 0000000..80951ff
--- /dev/null
+++ b/AutoDark.sln
@@ -0,0 +1,25 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 15
+VisualStudioVersion = 15.0.27428.2027
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AutoDark", "AutoDark\AutoDark.csproj", "{F24CB25A-C684-4CCB-9346-A0535AB405F9}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{F24CB25A-C684-4CCB-9346-A0535AB405F9}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{F24CB25A-C684-4CCB-9346-A0535AB405F9}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{F24CB25A-C684-4CCB-9346-A0535AB405F9}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{F24CB25A-C684-4CCB-9346-A0535AB405F9}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {7B70677A-B307-485C-B2F3-186C5D5C8A9D}
+	EndGlobalSection
+EndGlobal
diff --git a/AutoDark/AutoDark.cs b/AutoDark/AutoDark.cs
new file mode 100644
index 0000000..b8f323a
--- /dev/null
+++ b/AutoDark/AutoDark.cs
@@ -0,0 +1,40 @@
+using System;
+using Microsoft.Win32;
+
+namespace AutoDark {
+	class AutoDark {
+		static int Main(string[] args) {
+			int mode = -1;
+
+			if (args.Length > 0 && args[0].Equals("dark", StringComparison.InvariantCultureIgnoreCase))
+				mode = 0;
+			else if (args.Length > 0 && args[0].Equals("light", StringComparison.InvariantCultureIgnoreCase))
+				mode = 1;
+			else if (args.Length > 0) // there is an argument, but it's invalid
+				return -1;
+
+			RegistryKey k = Registry.CurrentUser.OpenSubKey(
+				"Software\\Microsoft\\Windows\\CurrentVersion\\Themes\\Personalize",
+				true
+			);
+
+			// if no argument, then just toggle
+			if (mode == -1) {
+				string val = k.GetValue("AppsUseLightTheme", 1).ToString();
+				mode = int.Parse(val);
+				if (mode == 1)
+					mode = 0;
+				else
+					mode = 1;
+			}
+
+			if (k != null) {
+				k.SetValue("AppsUseLightTheme", mode, RegistryValueKind.DWord);
+				k.Close();
+			} else
+				return -2;
+
+			return 0;
+		}
+	}
+}
diff --git a/AutoDark/AutoDark.csproj b/AutoDark/AutoDark.csproj
new file mode 100644
index 0000000..4c1812e
--- /dev/null
+++ b/AutoDark/AutoDark.csproj
@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{F24CB25A-C684-4CCB-9346-A0535AB405F9}</ProjectGuid>
+    <OutputType>WinExe</OutputType>
+    <RootNamespace>AutoDark</RootNamespace>
+    <AssemblyName>AutoDark</AssemblyName>
+    <TargetFrameworkVersion>v4.7</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugType>none</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup>
+    <StartupObject />
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="AutoDark.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+</Project>
\ No newline at end of file
diff --git a/AutoDark/Properties/AssemblyInfo.cs b/AutoDark/Properties/AssemblyInfo.cs
new file mode 100644
index 0000000..8d1dbe1
--- /dev/null
+++ b/AutoDark/Properties/AssemblyInfo.cs
@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("AutoDark")]
+[assembly: AssemblyDescription("Sets/toggles the Windows dark mode setting")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("AutoDark")]
+[assembly: AssemblyCopyright("Copyright ©  2018")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible
+// to COM components.  If you need to access a type in this assembly from
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("f24cb25a-c684-4ccb-9346-a0535ab405f9")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]