diff --git a/paket.lock b/paket.lock
index b9b118b..565d730 100644
--- a/paket.lock
+++ b/paket.lock
@@ -3,28 +3,26 @@
 GROUP Build
 NUGET
   remote: https://www.nuget.org/api/v2
-  specs:
-    FAKE (4.27)
+    FAKE (4.29.2)
 
 GROUP Core
 NUGET
   remote: https://www.nuget.org/api/v2
-  specs:
     OpenTK (1.1.1589.5942)
     System.IO.Abstractions (2.0.0.124)
 
 GROUP Test
 NUGET
   remote: https://www.nuget.org/api/v2
-  specs:
-    Moq (4.2.1510.2205)
+    Castle.Core (3.3.3) - framework: >= net45
+    Moq (4.5.10)
+      Castle.Core (>= 3.3.3) - framework: >= net45
     NUnit (2.6.4)
     Shouldly (2.6)
 
 GROUP Tools
 NUGET
   remote: https://www.nuget.org/api/v2
-  specs:
     coveralls.io (1.3.4)
     NUnit.Runners (2.6.4)
     OpenCover (4.6.519)
diff --git a/src/XogoEngine.OpenAL.Test/XogoEngine.OpenAL.Test.csproj b/src/XogoEngine.OpenAL.Test/XogoEngine.OpenAL.Test.csproj
index 82d69bf..4c383b8 100644
--- a/src/XogoEngine.OpenAL.Test/XogoEngine.OpenAL.Test.csproj
+++ b/src/XogoEngine.OpenAL.Test/XogoEngine.OpenAL.Test.csproj
@@ -42,7 +42,7 @@
     </Reference>
   </ItemGroup>
   <Choose>
-    <When Condition="$(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.0' Or $(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1' Or $(TargetFrameworkVersion) == 'v4.6.2')">
+    <When Condition="($(TargetFrameworkIdentifier) == '.NETStandard' And ($(TargetFrameworkVersion) == 'v1.0' Or $(TargetFrameworkVersion) == 'v1.1' Or $(TargetFrameworkVersion) == 'v1.2' Or $(TargetFrameworkVersion) == 'v1.3' Or $(TargetFrameworkVersion) == 'v1.4' Or $(TargetFrameworkVersion) == 'v1.5')) Or ($(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.0' Or $(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1' Or $(TargetFrameworkVersion) == 'v4.6.2'))">
       <ItemGroup>
         <Reference Include="OpenTK">
           <HintPath>..\..\packages\core\OpenTK\lib\NET40\OpenTK.dll</HintPath>
@@ -69,7 +69,7 @@
         </Reference>
       </ItemGroup>
     </When>
-    <When Condition="$(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.0' Or $(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1' Or $(TargetFrameworkVersion) == 'v4.6.2')">
+    <When Condition="($(TargetFrameworkIdentifier) == '.NETStandard' And ($(TargetFrameworkVersion) == 'v1.0' Or $(TargetFrameworkVersion) == 'v1.1' Or $(TargetFrameworkVersion) == 'v1.2' Or $(TargetFrameworkVersion) == 'v1.3' Or $(TargetFrameworkVersion) == 'v1.4' Or $(TargetFrameworkVersion) == 'v1.5')) Or ($(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.0' Or $(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1' Or $(TargetFrameworkVersion) == 'v4.6.2'))">
       <ItemGroup>
         <Reference Include="Shouldly">
           <HintPath>..\..\packages\test\Shouldly\lib\net40\Shouldly.dll</HintPath>
diff --git a/src/XogoEngine.OpenAL/XogoEngine.OpenAL.csproj b/src/XogoEngine.OpenAL/XogoEngine.OpenAL.csproj
index 9d33a9e..0661658 100644
--- a/src/XogoEngine.OpenAL/XogoEngine.OpenAL.csproj
+++ b/src/XogoEngine.OpenAL/XogoEngine.OpenAL.csproj
@@ -43,7 +43,7 @@
     <Reference Include="System" />
   </ItemGroup>
   <Choose>
-    <When Condition="$(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.0' Or $(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1' Or $(TargetFrameworkVersion) == 'v4.6.2')">
+    <When Condition="($(TargetFrameworkIdentifier) == '.NETStandard' And ($(TargetFrameworkVersion) == 'v1.0' Or $(TargetFrameworkVersion) == 'v1.1' Or $(TargetFrameworkVersion) == 'v1.2' Or $(TargetFrameworkVersion) == 'v1.3' Or $(TargetFrameworkVersion) == 'v1.4' Or $(TargetFrameworkVersion) == 'v1.5')) Or ($(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.0' Or $(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1' Or $(TargetFrameworkVersion) == 'v4.6.2'))">
       <ItemGroup>
         <Reference Include="OpenTK">
           <HintPath>..\..\packages\core\OpenTK\lib\NET40\OpenTK.dll</HintPath>
diff --git a/src/XogoEngine.OpenGL.Test/XogoEngine.OpenGL.Test.csproj b/src/XogoEngine.OpenGL.Test/XogoEngine.OpenGL.Test.csproj
index 79f6e6e..093ed67 100644
--- a/src/XogoEngine.OpenGL.Test/XogoEngine.OpenGL.Test.csproj
+++ b/src/XogoEngine.OpenGL.Test/XogoEngine.OpenGL.Test.csproj
@@ -61,7 +61,7 @@
     </Reference>
   </ItemGroup>
   <Choose>
-    <When Condition="$(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.0' Or $(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1' Or $(TargetFrameworkVersion) == 'v4.6.2')">
+    <When Condition="($(TargetFrameworkIdentifier) == '.NETStandard' And ($(TargetFrameworkVersion) == 'v1.0' Or $(TargetFrameworkVersion) == 'v1.1' Or $(TargetFrameworkVersion) == 'v1.2' Or $(TargetFrameworkVersion) == 'v1.3' Or $(TargetFrameworkVersion) == 'v1.4' Or $(TargetFrameworkVersion) == 'v1.5')) Or ($(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.0' Or $(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1' Or $(TargetFrameworkVersion) == 'v4.6.2'))">
       <ItemGroup>
         <Reference Include="OpenTK">
           <HintPath>..\..\packages\core\OpenTK\lib\NET40\OpenTK.dll</HintPath>
@@ -72,28 +72,21 @@
     </When>
   </Choose>
   <Choose>
-    <When Condition="$(TargetFrameworkIdentifier) == '.NETFramework' And $(TargetFrameworkVersion) == 'v3.5'">
+    <When Condition="$(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1' Or $(TargetFrameworkVersion) == 'v4.6.2')">
       <ItemGroup>
-        <Reference Include="Moq">
-          <HintPath>..\..\packages\test\Moq\lib\net35\Moq.dll</HintPath>
+        <Reference Include="Castle.Core">
+          <HintPath>..\..\packages\test\Castle.Core\lib\net45\Castle.Core.dll</HintPath>
           <Private>True</Private>
           <Paket>True</Paket>
         </Reference>
       </ItemGroup>
     </When>
-    <When Condition="$(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.0' Or $(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1' Or $(TargetFrameworkVersion) == 'v4.6.2')">
+  </Choose>
+  <Choose>
+    <When Condition="($(TargetFrameworkIdentifier) == '.NETStandard' And ($(TargetFrameworkVersion) == 'v1.1' Or $(TargetFrameworkVersion) == 'v1.2' Or $(TargetFrameworkVersion) == 'v1.3' Or $(TargetFrameworkVersion) == 'v1.4' Or $(TargetFrameworkVersion) == 'v1.5')) Or ($(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1' Or $(TargetFrameworkVersion) == 'v4.6.2'))">
       <ItemGroup>
         <Reference Include="Moq">
-          <HintPath>..\..\packages\test\Moq\lib\net40\Moq.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-    <When Condition="$(TargetFrameworkIdentifier) == 'Silverlight' And $(TargetFrameworkVersion) == 'v5.0'">
-      <ItemGroup>
-        <Reference Include="Moq.Silverlight">
-          <HintPath>..\..\packages\test\Moq\lib\sl5\Moq.Silverlight.dll</HintPath>
+          <HintPath>..\..\packages\test\Moq\lib\net45\Moq.dll</HintPath>
           <Private>True</Private>
           <Paket>True</Paket>
         </Reference>
@@ -117,7 +110,7 @@
         </Reference>
       </ItemGroup>
     </When>
-    <When Condition="$(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.0' Or $(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1' Or $(TargetFrameworkVersion) == 'v4.6.2')">
+    <When Condition="($(TargetFrameworkIdentifier) == '.NETStandard' And ($(TargetFrameworkVersion) == 'v1.0' Or $(TargetFrameworkVersion) == 'v1.1' Or $(TargetFrameworkVersion) == 'v1.2' Or $(TargetFrameworkVersion) == 'v1.3' Or $(TargetFrameworkVersion) == 'v1.4' Or $(TargetFrameworkVersion) == 'v1.5')) Or ($(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.0' Or $(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1' Or $(TargetFrameworkVersion) == 'v4.6.2'))">
       <ItemGroup>
         <Reference Include="Shouldly">
           <HintPath>..\..\packages\test\Shouldly\lib\net40\Shouldly.dll</HintPath>
diff --git a/src/XogoEngine.OpenGL/XogoEngine.OpenGL.csproj b/src/XogoEngine.OpenGL/XogoEngine.OpenGL.csproj
index 0e1ff24..e0fa857 100644
--- a/src/XogoEngine.OpenGL/XogoEngine.OpenGL.csproj
+++ b/src/XogoEngine.OpenGL/XogoEngine.OpenGL.csproj
@@ -87,7 +87,7 @@
     <Reference Include="System" />
   </ItemGroup>
   <Choose>
-    <When Condition="$(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.0' Or $(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1' Or $(TargetFrameworkVersion) == 'v4.6.2')">
+    <When Condition="($(TargetFrameworkIdentifier) == '.NETStandard' And ($(TargetFrameworkVersion) == 'v1.0' Or $(TargetFrameworkVersion) == 'v1.1' Or $(TargetFrameworkVersion) == 'v1.2' Or $(TargetFrameworkVersion) == 'v1.3' Or $(TargetFrameworkVersion) == 'v1.4' Or $(TargetFrameworkVersion) == 'v1.5')) Or ($(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.0' Or $(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1' Or $(TargetFrameworkVersion) == 'v4.6.2'))">
       <ItemGroup>
         <Reference Include="OpenTK">
           <HintPath>..\..\packages\core\OpenTK\lib\NET40\OpenTK.dll</HintPath>
diff --git a/src/XogoEngine.Test/Graphics/SpriteTest.cs b/src/XogoEngine.Test/Graphics/SpriteTest.cs
index 05acf6b..cde190c 100644
--- a/src/XogoEngine.Test/Graphics/SpriteTest.cs
+++ b/src/XogoEngine.Test/Graphics/SpriteTest.cs
@@ -86,5 +86,17 @@ public void SpriteModifiedEvent_ShouldNotBeFired_IfSpriteHasNotChanged()
             invoked.ShouldBeFalse();
             sprite.SpriteModified -= action;
         }
+
+        [Test]
+        public void SpriteModifiedEvent_ShouldBeFired_OnSwitchedTextureRegion()
+        {
+            bool invoked = false;
+            Sprite.SpriteHandler action = (sender, e) => invoked = true;
+            sprite.SpriteModified += action;
+
+            sprite.Modify(s => s.TextureRegion = new TextureRegion(0, 0, 50, 50));
+            invoked.ShouldBeTrue();
+            sprite.SpriteModified -= action;
+        }
     }
 }
diff --git a/src/XogoEngine.Test/XogoEngine.Test.csproj b/src/XogoEngine.Test/XogoEngine.Test.csproj
index 6a21cb5..aa4e1ef 100644
--- a/src/XogoEngine.Test/XogoEngine.Test.csproj
+++ b/src/XogoEngine.Test/XogoEngine.Test.csproj
@@ -83,7 +83,7 @@
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <Choose>
-    <When Condition="$(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.0' Or $(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1' Or $(TargetFrameworkVersion) == 'v4.6.2')">
+    <When Condition="($(TargetFrameworkIdentifier) == '.NETStandard' And ($(TargetFrameworkVersion) == 'v1.0' Or $(TargetFrameworkVersion) == 'v1.1' Or $(TargetFrameworkVersion) == 'v1.2' Or $(TargetFrameworkVersion) == 'v1.3' Or $(TargetFrameworkVersion) == 'v1.4' Or $(TargetFrameworkVersion) == 'v1.5')) Or ($(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.0' Or $(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1' Or $(TargetFrameworkVersion) == 'v4.6.2'))">
       <ItemGroup>
         <Reference Include="OpenTK">
           <HintPath>..\..\packages\core\OpenTK\lib\NET40\OpenTK.dll</HintPath>
@@ -94,7 +94,7 @@
     </When>
   </Choose>
   <Choose>
-    <When Condition="$(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.0' Or $(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1' Or $(TargetFrameworkVersion) == 'v4.6.2')">
+    <When Condition="($(TargetFrameworkIdentifier) == '.NETStandard' And ($(TargetFrameworkVersion) == 'v1.0' Or $(TargetFrameworkVersion) == 'v1.1' Or $(TargetFrameworkVersion) == 'v1.2' Or $(TargetFrameworkVersion) == 'v1.3' Or $(TargetFrameworkVersion) == 'v1.4' Or $(TargetFrameworkVersion) == 'v1.5')) Or ($(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.0' Or $(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1' Or $(TargetFrameworkVersion) == 'v4.6.2'))">
       <ItemGroup>
         <Reference Include="System.IO.Abstractions">
           <HintPath>..\..\packages\core\System.IO.Abstractions\lib\net40\System.IO.Abstractions.dll</HintPath>
@@ -105,28 +105,21 @@
     </When>
   </Choose>
   <Choose>
-    <When Condition="$(TargetFrameworkIdentifier) == '.NETFramework' And $(TargetFrameworkVersion) == 'v3.5'">
+    <When Condition="$(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1' Or $(TargetFrameworkVersion) == 'v4.6.2')">
       <ItemGroup>
-        <Reference Include="Moq">
-          <HintPath>..\..\packages\test\Moq\lib\net35\Moq.dll</HintPath>
+        <Reference Include="Castle.Core">
+          <HintPath>..\..\packages\test\Castle.Core\lib\net45\Castle.Core.dll</HintPath>
           <Private>True</Private>
           <Paket>True</Paket>
         </Reference>
       </ItemGroup>
     </When>
-    <When Condition="$(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.0' Or $(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1' Or $(TargetFrameworkVersion) == 'v4.6.2')">
+  </Choose>
+  <Choose>
+    <When Condition="($(TargetFrameworkIdentifier) == '.NETStandard' And ($(TargetFrameworkVersion) == 'v1.1' Or $(TargetFrameworkVersion) == 'v1.2' Or $(TargetFrameworkVersion) == 'v1.3' Or $(TargetFrameworkVersion) == 'v1.4' Or $(TargetFrameworkVersion) == 'v1.5')) Or ($(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1' Or $(TargetFrameworkVersion) == 'v4.6.2'))">
       <ItemGroup>
         <Reference Include="Moq">
-          <HintPath>..\..\packages\test\Moq\lib\net40\Moq.dll</HintPath>
-          <Private>True</Private>
-          <Paket>True</Paket>
-        </Reference>
-      </ItemGroup>
-    </When>
-    <When Condition="$(TargetFrameworkIdentifier) == 'Silverlight' And $(TargetFrameworkVersion) == 'v5.0'">
-      <ItemGroup>
-        <Reference Include="Moq.Silverlight">
-          <HintPath>..\..\packages\test\Moq\lib\sl5\Moq.Silverlight.dll</HintPath>
+          <HintPath>..\..\packages\test\Moq\lib\net45\Moq.dll</HintPath>
           <Private>True</Private>
           <Paket>True</Paket>
         </Reference>
@@ -150,7 +143,7 @@
         </Reference>
       </ItemGroup>
     </When>
-    <When Condition="$(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.0' Or $(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1' Or $(TargetFrameworkVersion) == 'v4.6.2')">
+    <When Condition="($(TargetFrameworkIdentifier) == '.NETStandard' And ($(TargetFrameworkVersion) == 'v1.0' Or $(TargetFrameworkVersion) == 'v1.1' Or $(TargetFrameworkVersion) == 'v1.2' Or $(TargetFrameworkVersion) == 'v1.3' Or $(TargetFrameworkVersion) == 'v1.4' Or $(TargetFrameworkVersion) == 'v1.5')) Or ($(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.0' Or $(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1' Or $(TargetFrameworkVersion) == 'v4.6.2'))">
       <ItemGroup>
         <Reference Include="Shouldly">
           <HintPath>..\..\packages\test\Shouldly\lib\net40\Shouldly.dll</HintPath>
diff --git a/src/XogoEngine/XogoEngine.csproj b/src/XogoEngine/XogoEngine.csproj
index 0f5dcad..ac8bc50 100644
--- a/src/XogoEngine/XogoEngine.csproj
+++ b/src/XogoEngine/XogoEngine.csproj
@@ -83,7 +83,7 @@
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <Choose>
-    <When Condition="$(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.0' Or $(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1' Or $(TargetFrameworkVersion) == 'v4.6.2')">
+    <When Condition="($(TargetFrameworkIdentifier) == '.NETStandard' And ($(TargetFrameworkVersion) == 'v1.0' Or $(TargetFrameworkVersion) == 'v1.1' Or $(TargetFrameworkVersion) == 'v1.2' Or $(TargetFrameworkVersion) == 'v1.3' Or $(TargetFrameworkVersion) == 'v1.4' Or $(TargetFrameworkVersion) == 'v1.5')) Or ($(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.0' Or $(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1' Or $(TargetFrameworkVersion) == 'v4.6.2'))">
       <ItemGroup>
         <Reference Include="OpenTK">
           <HintPath>..\..\packages\core\OpenTK\lib\NET40\OpenTK.dll</HintPath>
@@ -94,7 +94,7 @@
     </When>
   </Choose>
   <Choose>
-    <When Condition="$(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.0' Or $(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1' Or $(TargetFrameworkVersion) == 'v4.6.2')">
+    <When Condition="($(TargetFrameworkIdentifier) == '.NETStandard' And ($(TargetFrameworkVersion) == 'v1.0' Or $(TargetFrameworkVersion) == 'v1.1' Or $(TargetFrameworkVersion) == 'v1.2' Or $(TargetFrameworkVersion) == 'v1.3' Or $(TargetFrameworkVersion) == 'v1.4' Or $(TargetFrameworkVersion) == 'v1.5')) Or ($(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.0' Or $(TargetFrameworkVersion) == 'v4.5' Or $(TargetFrameworkVersion) == 'v4.5.1' Or $(TargetFrameworkVersion) == 'v4.5.2' Or $(TargetFrameworkVersion) == 'v4.5.3' Or $(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1' Or $(TargetFrameworkVersion) == 'v4.6.2'))">
       <ItemGroup>
         <Reference Include="System.IO.Abstractions">
           <HintPath>..\..\packages\core\System.IO.Abstractions\lib\net40\System.IO.Abstractions.dll</HintPath>