diff --git a/src/Umbraco.Core/IMainDom.cs b/src/Umbraco.Abstractions/IMainDom.cs
similarity index 100%
rename from src/Umbraco.Core/IMainDom.cs
rename to src/Umbraco.Abstractions/IMainDom.cs
diff --git a/src/Umbraco.Core/SimpleMainDom.cs b/src/Umbraco.Abstractions/SimpleMainDom.cs
similarity index 100%
rename from src/Umbraco.Core/SimpleMainDom.cs
rename to src/Umbraco.Abstractions/SimpleMainDom.cs
diff --git a/src/Umbraco.Core/SystemUtilities.cs b/src/Umbraco.Core/SystemUtilities.cs
deleted file mode 100644
index 30ce282063..0000000000
--- a/src/Umbraco.Core/SystemUtilities.cs
+++ /dev/null
@@ -1,48 +0,0 @@
-using System.Security;
-using System.Web;
-
-namespace Umbraco.Core
-{
-    /// <summary>
-    /// Static helper methods for returning information about the current System
-    /// </summary>
-    public static class SystemUtilities
-    {
-        private static bool _knowTrustLevel;
-        private static AspNetHostingPermissionLevel _trustLevel;
-
-        /// <summary>
-        /// Get the current trust level of the hosted application
-        /// </summary>
-        /// <returns></returns>
-        public static AspNetHostingPermissionLevel GetCurrentTrustLevel()
-        {
-            if (_knowTrustLevel) return _trustLevel;
-
-            foreach (var trustLevel in new[] {
-                                                 AspNetHostingPermissionLevel.Unrestricted,
-                                                 AspNetHostingPermissionLevel.High,
-                                                 AspNetHostingPermissionLevel.Medium,
-                                                 AspNetHostingPermissionLevel.Low,
-                                                 AspNetHostingPermissionLevel.Minimal })
-            {
-                try
-                {
-                    new AspNetHostingPermission(trustLevel).Demand();
-                }
-                catch (SecurityException)
-                {
-                    continue;
-                }
-
-                _trustLevel = trustLevel;
-                _knowTrustLevel = true;
-                return _trustLevel;
-            }
-
-            _trustLevel = AspNetHostingPermissionLevel.None;
-            _knowTrustLevel = true;
-            return _trustLevel;
-        }
-    }
-}
diff --git a/src/Umbraco.Core/Umbraco.Core.csproj b/src/Umbraco.Core/Umbraco.Core.csproj
index 9262986b7a..f02fc7b0bc 100755
--- a/src/Umbraco.Core/Umbraco.Core.csproj
+++ b/src/Umbraco.Core/Umbraco.Core.csproj
@@ -328,7 +328,6 @@
     <Compile Include="Events\ExportedMemberEventArgs.cs" />
     <Compile Include="Events\RolesEventArgs.cs" />
     <Compile Include="Events\UserGroupWithUsers.cs" />
-    <Compile Include="IMainDom.cs" />
     <Compile Include="IO\IFileSystems.cs" />
     <Compile Include="IO\IMediaFileSystem.cs" />
     <Compile Include="GuidUtils.cs" />
@@ -1442,7 +1441,6 @@
     <Compile Include="Compose\ManifestWatcherComponent.cs" />
     <Compile Include="Compose\RelateOnCopyComponent.cs" />
     <Compile Include="Compose\RelateOnTrashComponent.cs" />
-    <Compile Include="SimpleMainDom.cs" />
     <Compile Include="Strings\CleanStringType.cs" />
     <Compile Include="Strings\ContentBaseExtensions.cs" />
     <Compile Include="Strings\Css\StylesheetHelper.cs" />
@@ -1472,7 +1470,6 @@
     <Compile Include="Sync\ServerMessengerBase.cs" />
     <Compile Include="Sync\ServerRole.cs" />
     <Compile Include="Sync\SingleServerRegistrar.cs" />
-    <Compile Include="SystemUtilities.cs" />
     <Compile Include="ThreadExtensions.cs" />
     <Compile Include="Collections\TopoGraph.cs" />
     <Compile Include="TypeExtensions.cs" />
@@ -1517,7 +1514,7 @@
   </ItemGroup>
   <ItemGroup>
     <Folder Include="Auditing\" />
-    <Folder Include="Exceptions" />
+    <Folder Include="Exceptions\" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\Umbraco.Abstractions\Umbraco.Abstractions.csproj">