diff --git a/Directory.Build.props b/Directory.Build.props
new file mode 100644
index 0000000000..e2adeae59e
--- /dev/null
+++ b/Directory.Build.props
@@ -0,0 +1,14 @@
+<Project>
+  <PropertyGroup>
+    <Copyright>Copyright © 2020</Copyright>
+    <Company>Mulholland Software/James Willock</Company>
+
+    <Configurations>Debug;Release</Configurations>
+    <LangVersion>8.0</LangVersion>
+    <ErrorReport>prompt</ErrorReport>
+
+    <SignAssembly>true</SignAssembly>
+    <AssemblyOriginatorKeyFile>..\key.snk</AssemblyOriginatorKeyFile>
+    <DelaySign>false</DelaySign>
+  </PropertyGroup>
+</Project>
\ No newline at end of file
diff --git a/MahMaterialDragablzMashUp/MahAppsDragablzDemo.csproj b/MahMaterialDragablzMashUp/MahAppsDragablzDemo.csproj
index f8be5526a2..425e66c600 100644
--- a/MahMaterialDragablzMashUp/MahAppsDragablzDemo.csproj
+++ b/MahMaterialDragablzMashUp/MahAppsDragablzDemo.csproj
@@ -8,9 +8,7 @@
     <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
     <AssemblyTitle>MahMaterialDragablzMashUp</AssemblyTitle>
     <Product>MahMaterialDragablzMashUp</Product>
-    <Copyright>Copyright © 2020</Copyright>
     <ExtrasEnableWpfProjectSetup>true</ExtrasEnableWpfProjectSetup>
-    <ErrorReport>prompt</ErrorReport>
     <Prefer32Bit>true</Prefer32Bit>
   </PropertyGroup>
   <ItemGroup>
diff --git a/MainDemo.Wpf/MaterialDesignDemo.csproj b/MainDemo.Wpf/MaterialDesignDemo.csproj
index 0fe44c0449..59302e9b95 100644
--- a/MainDemo.Wpf/MaterialDesignDemo.csproj
+++ b/MainDemo.Wpf/MaterialDesignDemo.csproj
@@ -7,13 +7,9 @@
     <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
     <AssemblyTitle>MaterialDesignColors.WpfExample</AssemblyTitle>
     <Product>MaterialDesignColors.WpfExample</Product>
-    <Copyright>Copyright © 2020</Copyright>
     <ExtrasEnableWpfProjectSetup>true</ExtrasEnableWpfProjectSetup>
-    <Configurations>Debug;Release</Configurations>
-    <ErrorReport>prompt</ErrorReport>
     <Prefer32Bit>true</Prefer32Bit>
     <ApplicationIcon>favicon.ico</ApplicationIcon>
-    <LangVersion>8.0</LangVersion>
     <UseWPF>true</UseWPF>
   </PropertyGroup>
   <Import Project="..\packages\ShowMeTheXAML.MSBuild\build\ShowMeTheXAML.MSBuild.targets" Label="Paket" />
diff --git a/MaterialDesignColors.Wpf.Tests/MaterialDesignColors.Wpf.Tests.csproj b/MaterialDesignColors.Wpf.Tests/MaterialDesignColors.Wpf.Tests.csproj
index ef842f11ed..7a64179c0a 100644
--- a/MaterialDesignColors.Wpf.Tests/MaterialDesignColors.Wpf.Tests.csproj
+++ b/MaterialDesignColors.Wpf.Tests/MaterialDesignColors.Wpf.Tests.csproj
@@ -7,8 +7,6 @@
     <SolutionDir Condition="$(SolutionDir) == '' Or $(SolutionDir) == '*Undefined*'">..\</SolutionDir>
     <AssemblyTitle>MaterialDesignColors.Wpf.Fixture</AssemblyTitle>
     <Product>MaterialDesignColors.Wpf.Fixture</Product>
-    <Copyright>Copyright © 2020</Copyright>
-    <LangVersion>8.0</LangVersion>
   </PropertyGroup>
   <Import Project="..\packages\xunit.core\build\xunit.core.props" Condition="Exists('..\packages\xunit.core\build\xunit.core.props')" Label="Paket" />
   <Import Project="..\packages\xunit.runner.visualstudio\build\$(__paket__xunit_runner_visualstudio_props).props" Condition="Exists('..\packages\xunit.runner.visualstudio\build\$(__paket__xunit_runner_visualstudio_props).props')" Label="Paket" />
diff --git a/MaterialDesignColors.Wpf/MaterialDesignColors.Wpf.csproj b/MaterialDesignColors.Wpf/MaterialDesignColors.Wpf.csproj
index b9c565520b..f0a089fa89 100644
--- a/MaterialDesignColors.Wpf/MaterialDesignColors.Wpf.csproj
+++ b/MaterialDesignColors.Wpf/MaterialDesignColors.Wpf.csproj
@@ -8,16 +8,11 @@
     <ProjectTypeGuids>{60dc8134-eba5-43b8-bcc9-bb4bc16c2548};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
     <MDIXColorsVersion Condition="$(MDIXColorsVersion) == '' Or $(MDIXColorsVersion) == '*Undefined*'">1.0.1</MDIXColorsVersion>
     <AssemblyTitle>MaterialDesignColors.Wpf</AssemblyTitle>
-    <Company>Mulholland Software/James Willock</Company>
     <Product>MaterialDesignColors.Wpf</Product>
     <Description>Material Design in XAML Toolkit - Colors</Description>
-    <Copyright>Copyright © 2020</Copyright>
     <Version>$(MDIXColorsVersion)</Version>
     <AssemblyVersion>$(MDIXColorsVersion)</AssemblyVersion>
     <ExtrasEnableWpfProjectSetup>true</ExtrasEnableWpfProjectSetup>
-    <Configurations>Debug;Release</Configurations>
-    <LangVersion>8.0</LangVersion>
-    <ErrorReport>prompt</ErrorReport>
   </PropertyGroup>
   <Import Project="..\.paket\Paket.Restore.targets" />
 </Project>
\ No newline at end of file
diff --git a/MaterialDesignThemes.MahApps/MaterialDesignThemes.MahApps.csproj b/MaterialDesignThemes.MahApps/MaterialDesignThemes.MahApps.csproj
index 72faac25f4..8d79e258e5 100644
--- a/MaterialDesignThemes.MahApps/MaterialDesignThemes.MahApps.csproj
+++ b/MaterialDesignThemes.MahApps/MaterialDesignThemes.MahApps.csproj
@@ -7,11 +7,9 @@
     <MDIXMahAppsVersion Condition="$(MDIXMahAppsVersion) == '' Or $(MDIXMahAppsVersion) == '*Undefined*'">1.0.1</MDIXMahAppsVersion>
     <AssemblyTitle>MaterialDesignThemes.MahApps</AssemblyTitle>
     <Product>MaterialDesignThemes.MahApps</Product>
-    <Copyright>Copyright © 2020 James Willock, Mulholland Software &amp; Contributors</Copyright>
     <Version>$(MDIXMahAppsVersion)</Version>
     <AssemblyVersion>$(MDIXMahAppsVersion)</AssemblyVersion>
     <ExtrasEnableWpfProjectSetup>true</ExtrasEnableWpfProjectSetup>
-    <LangVersion>8.0</LangVersion>
     <UseWPF>true</UseWPF>
   </PropertyGroup>
   <ItemGroup>
diff --git a/MaterialDesignThemes.Wpf.Tests/MaterialDesignThemes.Wpf.Tests.csproj b/MaterialDesignThemes.Wpf.Tests/MaterialDesignThemes.Wpf.Tests.csproj
index 78746270c0..3e0cecc31d 100644
--- a/MaterialDesignThemes.Wpf.Tests/MaterialDesignThemes.Wpf.Tests.csproj
+++ b/MaterialDesignThemes.Wpf.Tests/MaterialDesignThemes.Wpf.Tests.csproj
@@ -3,10 +3,8 @@
   <PropertyGroup>
     <TargetFrameworks>net472;netcoreapp3.1</TargetFrameworks>
     <UseWPF>true</UseWPF>
-    <LangVersion>8.0</LangVersion>
     <AssemblyTitle>MaterialDesignThemes.Wpf.Tests</AssemblyTitle>
     <Product>MaterialDesignThemes.Wpf.Tests</Product>
-    <Copyright>Copyright © 2020</Copyright>
   </PropertyGroup>
   <ItemGroup Condition="'$(TargetFramework)'=='net472'">
     <Reference Include="PresentationCore" />
diff --git a/MaterialDesignThemes.Wpf/MaterialDesignThemes.Wpf.csproj b/MaterialDesignThemes.Wpf/MaterialDesignThemes.Wpf.csproj
index 16929d2aab..767e869e0b 100644
--- a/MaterialDesignThemes.Wpf/MaterialDesignThemes.Wpf.csproj
+++ b/MaterialDesignThemes.Wpf/MaterialDesignThemes.Wpf.csproj
@@ -5,18 +5,13 @@
     <UseWPF>true</UseWPF>
     <ProjectTypeGuids>{60dc8134-eba5-43b8-bcc9-bb4bc16c2548};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
     <MDIXVersion Condition="$(MDIXVersion) == '' Or $(MDIXVersion) == '*Undefined*'">1.0.1</MDIXVersion>
-    <LangVersion>8.0</LangVersion>
     <AssemblyTitle>MaterialDesignThemes.Wpf</AssemblyTitle>
-    <Company>Mulholland Software/James Willock</Company>
     <Product>MaterialDesignColors.Wpf</Product>
     <Description>Material Design in XAML Toolkit - WPF Themes</Description>
-    <Copyright>Copyright © 2020</Copyright>
     <Version>$(MDIXVersion)</Version>
     <AssemblyVersion>$(MDIXVersion)</AssemblyVersion>
     <NoWarn>CS1591;CS1574</NoWarn>
     <ExtrasEnableWpfProjectSetup>true</ExtrasEnableWpfProjectSetup>
-    <Configurations>Debug;Release</Configurations>
-    <ErrorReport>prompt</ErrorReport>
     <DocumentationFile>bin\$(Configuration)\MaterialDesignThemes.Wpf.xml</DocumentationFile>
   </PropertyGroup>
   <ItemGroup>
diff --git a/MaterialDesignThemes.Wpf/Properties/AssemblyInfo.cs b/MaterialDesignThemes.Wpf/Properties/AssemblyInfo.cs
index 21aca99b6c..1d5adafc78 100644
--- a/MaterialDesignThemes.Wpf/Properties/AssemblyInfo.cs
+++ b/MaterialDesignThemes.Wpf/Properties/AssemblyInfo.cs
@@ -31,4 +31,9 @@
                                               // app, or any theme specific resource dictionaries)
 )]
 
-[assembly: InternalsVisibleTo("MaterialDesignThemes.Wpf.Tests")]
\ No newline at end of file
+[assembly: InternalsVisibleTo("MaterialDesignThemes.Wpf.Tests, PublicKey=" +
+    "002400000480000094000000060200000024000052534131000400000100010049bc83151c3134" +
+    "36a8868431b570bc5d626bc74d2d414b3147ae4e5945b69da039e5d22906b224557e5a8dfb3f86" +
+    "0f0bec65b13217a0eaa37f0cced961386e92fd4d920179893d348b0210660f73e47adbc481c7b5" +
+    "b63afbf3e60199685794599d28e915a30ca7dc879d9ad0dd0a0e7ea5e99937d637c4b1cb671fa4" +
+    "425248dd")]
\ No newline at end of file
diff --git a/MaterialDesignToolkit.Wpf.sln b/MaterialDesignToolkit.Wpf.sln
index b8f81c701b..1f5bfd7143 100644
--- a/MaterialDesignToolkit.Wpf.sln
+++ b/MaterialDesignToolkit.Wpf.sln
@@ -35,6 +35,7 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution
 	ProjectSection(SolutionItems) = preProject
 		.editorconfig = .editorconfig
 		azure-pipelines.yml = azure-pipelines.yml
+		Directory.Build.props = Directory.Build.props
 		global.json = global.json
 		MaterialDesignColors.nuspec = MaterialDesignColors.nuspec
 		MaterialDesignThemes.MahApps.nuspec = MaterialDesignThemes.MahApps.nuspec
diff --git a/key.snk b/key.snk
new file mode 100644
index 0000000000..47be096573
Binary files /dev/null and b/key.snk differ