diff --git a/WebDriver.snk b/WebDriver.snk
new file mode 100644
index 0000000000000..216cfabf2f76c
Binary files /dev/null and b/WebDriver.snk differ
diff --git a/dotnet/build.desc b/dotnet/build.desc
index 2b8ac05410ed5..4f66b0a05a0f5 100644
--- a/dotnet/build.desc
+++ b/dotnet/build.desc
@@ -16,6 +16,7 @@ dotnet_library(name = "dotnet",
     {"//cpp:noblur" : "WebDriver.FirefoxNoFocus.x86.dll"},
     {"//cpp:noblur64" : "WebDriver.FirefoxNoFocus.x64.dll"}
   ],
+  keyfile = "WebDriver.snk",
   out = "build/dotnet/WebDriver.dll",
   doc = "build/dotnet/WebDriver.xml"
 )
@@ -31,8 +32,9 @@ dotnet_library(name = "support",
     ":dotnet",
     "third_party/csharp/Castle.Core.2.5.2/Castle.Core.dll"
   ],
-  out = "build/dotnet/Webdriver.Support.dll",
-  doc = "build/dotnet/Webdriver.Support.xml"
+  keyfile = "WebDriver.snk",
+  out = "build/dotnet/WebDriver.Support.dll",
+  doc = "build/dotnet/WebDriver.Support.xml"
 )
 
 dotnet_library(name = "core",
@@ -44,6 +46,7 @@ dotnet_library(name = "core",
     "System.Xml.dll",
     "System.Web.dll"
   ],
+  keyfile = "WebDriver.snk",
   out = "build/dotnet/ThoughtWorks.Selenium.Core.dll",
   doc = "build/dotnet/ThoughtWorks.Selenium.Core.xml"
 )
@@ -76,6 +79,7 @@ dotnet_library(name = "webdriverbackedselenium",
     {"//javascript/selenium-atoms:isVisible" : "isVisible.js" },
     {"//javascript/selenium-atoms:type" : "type.js" }
   ],
+  keyfile = "WebDriver.snk",
   out = "build/dotnet/Selenium.WebDriverBackedSelenium.dll",
   doc = "build/dotnet/Selenium.WebDriverBackedSelenium.xml"
 )
diff --git a/dotnet/src/Selenium.Core/Selenium.Core.csproj b/dotnet/src/Selenium.Core/Selenium.Core.csproj
index f01611cc9611c..409168dedc427 100644
--- a/dotnet/src/Selenium.Core/Selenium.Core.csproj
+++ b/dotnet/src/Selenium.Core/Selenium.Core.csproj
@@ -12,8 +12,7 @@
     <AssemblyKeyContainerName>
     </AssemblyKeyContainerName>
     <AssemblyName>ThoughtWorks.Selenium.Core</AssemblyName>
-    <AssemblyOriginatorKeyFile>
-    </AssemblyOriginatorKeyFile>
+    <AssemblyOriginatorKeyFile>..\..\..\WebDriver.snk</AssemblyOriginatorKeyFile>
     <DefaultClientScript>JScript</DefaultClientScript>
     <DefaultHTMLPageLayout>Grid</DefaultHTMLPageLayout>
     <DefaultTargetSchema>IE50</DefaultTargetSchema>
@@ -81,6 +80,9 @@
     <ErrorReport>prompt</ErrorReport>
     <CodeAnalysisRuleSet>AllRules.ruleset</CodeAnalysisRuleSet>
   </PropertyGroup>
+  <PropertyGroup>
+    <SignAssembly>true</SignAssembly>
+  </PropertyGroup>
   <ItemGroup>
     <Reference Include="System">
       <Name>System</Name>
@@ -139,6 +141,11 @@
       <Install>true</Install>
     </BootstrapperPackage>
   </ItemGroup>
+  <ItemGroup>
+    <None Include="..\..\..\WebDriver.snk">
+      <Link>WebDriver.snk</Link>
+    </None>
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <PropertyGroup>
     <PreBuildEvent>
diff --git a/dotnet/src/Selenium.WebDriverBackedSelenium/Selenium.WebDriverBackedSelenium.csproj b/dotnet/src/Selenium.WebDriverBackedSelenium/Selenium.WebDriverBackedSelenium.csproj
index 88b6efec4d0a2..bd9f864932895 100644
--- a/dotnet/src/Selenium.WebDriverBackedSelenium/Selenium.WebDriverBackedSelenium.csproj
+++ b/dotnet/src/Selenium.WebDriverBackedSelenium/Selenium.WebDriverBackedSelenium.csproj
@@ -80,6 +80,12 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Release|x86'">
     <CodeAnalysisRuleSet>AllRules.ruleset</CodeAnalysisRuleSet>
   </PropertyGroup>
+  <PropertyGroup>
+    <SignAssembly>true</SignAssembly>
+  </PropertyGroup>
+  <PropertyGroup>
+    <AssemblyOriginatorKeyFile>..\..\..\WebDriver.snk</AssemblyOriginatorKeyFile>
+  </PropertyGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <ItemGroup>
     <Reference Include="System" />
@@ -224,6 +230,11 @@
       <Install>true</Install>
     </BootstrapperPackage>
   </ItemGroup>
+  <ItemGroup>
+    <None Include="..\..\..\WebDriver.snk">
+      <Link>WebDriver.snk</Link>
+    </None>
+  </ItemGroup>
   <PropertyGroup>
     <PostBuildEvent>copy /y "$(SolutionDir)java\client\src\org\openqa\selenium\internal\seleniumemulation\injectableSelenium.js" "$(TargetDir)"
 copy /y "$(SolutionDir)java\client\src\org\openqa\selenium\internal\seleniumemulation\htmlutils.js" "$(TargetDir)"
diff --git a/dotnet/src/WebDriver.Support/WebDriver.Support.csproj b/dotnet/src/WebDriver.Support/WebDriver.Support.csproj
index 26485886e47ab..e4337c16f203f 100644
--- a/dotnet/src/WebDriver.Support/WebDriver.Support.csproj
+++ b/dotnet/src/WebDriver.Support/WebDriver.Support.csproj
@@ -53,6 +53,12 @@
     <DocumentationFile>..\..\..\build\cli\Release\WebDriver.Support.xml</DocumentationFile>
     <CodeAnalysisRuleSet>AllRules.ruleset</CodeAnalysisRuleSet>
   </PropertyGroup>
+  <PropertyGroup>
+    <SignAssembly>true</SignAssembly>
+  </PropertyGroup>
+  <PropertyGroup>
+    <AssemblyOriginatorKeyFile>..\..\..\WebDriver.snk</AssemblyOriginatorKeyFile>
+  </PropertyGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
@@ -123,4 +129,9 @@
       <Install>true</Install>
     </BootstrapperPackage>
   </ItemGroup>
+  <ItemGroup>
+    <None Include="..\..\..\WebDriver.snk">
+      <Link>WebDriver.snk</Link>
+    </None>
+  </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/dotnet/src/WebDriver/WebDriver.csproj b/dotnet/src/WebDriver/WebDriver.csproj
index fe070baf33941..769d304654ded 100644
--- a/dotnet/src/WebDriver/WebDriver.csproj
+++ b/dotnet/src/WebDriver/WebDriver.csproj
@@ -53,6 +53,12 @@
     <DocumentationFile>..\..\..\build\cli\Release\WebDriver.xml</DocumentationFile>
     <CodeAnalysisRuleSet>AllRules.ruleset</CodeAnalysisRuleSet>
   </PropertyGroup>
+  <PropertyGroup>
+    <SignAssembly>true</SignAssembly>
+  </PropertyGroup>
+  <PropertyGroup>
+    <AssemblyOriginatorKeyFile>..\..\..\WebDriver.snk</AssemblyOriginatorKeyFile>
+  </PropertyGroup>
   <ItemGroup>
     <Reference Include="Ionic.Zip.Reduced, Version=1.9.1.1, Culture=neutral, PublicKeyToken=edbe51ad942a3f5c, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
@@ -220,6 +226,11 @@
       <Install>true</Install>
     </BootstrapperPackage>
   </ItemGroup>
+  <ItemGroup>
+    <None Include="..\..\..\WebDriver.snk">
+      <Link>WebDriver.snk</Link>
+    </None>
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
diff --git a/rake-tasks/crazy_fun/mappings/visualstudio.rb b/rake-tasks/crazy_fun/mappings/visualstudio.rb
index 017d3301a9a37..230f09d080ff9 100644
--- a/rake-tasks/crazy_fun/mappings/visualstudio.rb
+++ b/rake-tasks/crazy_fun/mappings/visualstudio.rb
@@ -95,6 +95,7 @@ def handle(fun, dir, args)
         csc_task.debug = :pdbonly
         csc_task.references references
         csc_task.resources embedded_resources
+        csc_task.keyfile = args[:keyfile] unless args[:keyfile].nil?
 
         copy_resources(dir, to_copy, output_dir)
         unless args[:files].nil?