diff --git a/src/Umbraco.Core/Composing/LightInjectExtensions.cs b/src/Umbraco.Core/Composing/LightInjectExtensions.cs
index c7b51404fe..68ba48c803 100644
--- a/src/Umbraco.Core/Composing/LightInjectExtensions.cs
+++ b/src/Umbraco.Core/Composing/LightInjectExtensions.cs
@@ -311,15 +311,15 @@ namespace Umbraco.Core.Composing
             // we HAVE to let LightInject throw - and catch at THE OUTERMOST if InvalidOperationException in LightInject.Anything!
 
             return factory.GetInstance(tService, serviceName, args);
-            try
-            {
-                return factory.GetInstance(tService, serviceName, args);
-            }
-            catch (Exception e)
-            {
-                LightInjectException.TryThrow(e, implementingType);
-                throw;
-            }
+            //try
+            //{
+            //    return factory.GetInstance(tService, serviceName, args);
+            //}
+            //catch (Exception e)
+            //{
+            //    LightInjectException.TryThrow(e, implementingType);
+            //    throw;
+            //}
         }
 
         /// <summary>
diff --git a/src/Umbraco.Core/IO/FileSystems.cs b/src/Umbraco.Core/IO/FileSystems.cs
index 33989122b8..5d7088b0e1 100644
--- a/src/Umbraco.Core/IO/FileSystems.cs
+++ b/src/Umbraco.Core/IO/FileSystems.cs
@@ -28,7 +28,6 @@ namespace Umbraco.Core.IO
         private ShadowWrapper _scriptsFileSystem;
         private ShadowWrapper _masterPagesFileSystem;
         private ShadowWrapper _mvcViewsFileSystem;
-        private ShadowWrapper _javaScriptLibraryFileSystem;
         
         // well-known file systems lazy initialization
         private object _wkfsLock = new object();
diff --git a/src/Umbraco.Core/Migrations/Upgrade/V_8_0_0/RefactorXmlColumns.cs b/src/Umbraco.Core/Migrations/Upgrade/V_8_0_0/RefactorXmlColumns.cs
index 8b85d6992e..b7d869ee62 100644
--- a/src/Umbraco.Core/Migrations/Upgrade/V_8_0_0/RefactorXmlColumns.cs
+++ b/src/Umbraco.Core/Migrations/Upgrade/V_8_0_0/RefactorXmlColumns.cs
@@ -67,13 +67,6 @@ namespace Umbraco.Core.Migrations.Upgrade.V_8_0_0
                 .Do();
         }
 
-        private bool ColumnExists(string tableName, string columnName)
-        {
-            // that's ok even on MySql
-            var columns = SqlSyntax.GetColumnsInSchema(Context.Database).Distinct().ToArray();
-            return columns.Any(x => x.TableName.InvariantEquals(tableName) && x.ColumnName.InvariantEquals(columnName));
-        }
-
         private void RemoveDuplicates()
         {
             const string sql = @"delete from cmsPreviewXml where versionId in (
diff --git a/src/Umbraco.Core/Models/MediaType.cs b/src/Umbraco.Core/Models/MediaType.cs
index bc8b7c4c89..9612fce728 100644
--- a/src/Umbraco.Core/Models/MediaType.cs
+++ b/src/Umbraco.Core/Models/MediaType.cs
@@ -48,7 +48,7 @@ namespace Umbraco.Core.Models
         /// Creates a deep clone of the current entity with its identity/alias and it's property identities reset
         /// </summary>
         /// <returns></returns>
-        public IMediaType DeepCloneWithResetIdentities(string alias)
+        public new IMediaType DeepCloneWithResetIdentities(string alias)
         {
             var clone = (MediaType)DeepClone();
             clone.Alias = alias;
diff --git a/src/Umbraco.Core/Packaging/DefaultPackageContext.cs b/src/Umbraco.Core/Packaging/DefaultPackageContext.cs
deleted file mode 100644
index c08418ec86..0000000000
--- a/src/Umbraco.Core/Packaging/DefaultPackageContext.cs
+++ /dev/null
@@ -1,45 +0,0 @@
-using System;
-using NuGet;
-using Umbraco.Core.Configuration;
-
-namespace Umbraco.Core.Packaging
-{
-    internal class DefaultPackageContext : IPackageContext
-    {
-        public DefaultPackageContext(Func<string, string> mapPath)
-        {}
-
-        private readonly string _localPackageRepoFolderPath;
-        private readonly string _pluginInstallFolderPath;
-        private readonly Lazy<IPackageManager> _localPackageManager;
-        private readonly Lazy<IPackageRepository> _localPackageRepository;
-        private readonly Lazy<IPackageManager> _publicPackageManager;
-        private readonly Lazy<IPackageManager> _privatePackageManager;
-        private readonly Lazy<IPackageRepository> _publicPackageRepository;
-        private readonly Lazy<IPackageRepository> _sprivatePackageRepository;
-
-        /// <summary>
-        /// Gets the local path resolver.
-        /// </summary>
-        public IPackagePathResolver LocalPathResolver
-        {
-            get { return ((PackageManager)LocalPackageManager).PathResolver; }
-        }
-
-        /// <summary>
-        /// Gets the local package manager.
-        /// </summary>
-        public IPackageManager LocalPackageManager
-        {
-            get { return _localPackageManager.Value; }
-        }
-
-        /// <summary>
-        /// Gets the public package manager.
-        /// </summary>
-        public IPackageManager PublicPackageManager
-        {
-            get { return _publicPackageManager.Value; }
-        }
-    }
-}
diff --git a/src/Umbraco.Core/Packaging/IPackageContext.cs b/src/Umbraco.Core/Packaging/IPackageContext.cs
deleted file mode 100644
index 41cf372ce6..0000000000
--- a/src/Umbraco.Core/Packaging/IPackageContext.cs
+++ /dev/null
@@ -1,11 +0,0 @@
-using NuGet;
-
-namespace Umbraco.Core.Packaging
-{
-    internal interface IPackageContext
-    {
-        IPackageManager LocalPackageManager { get; }
-        IPackageManager PublicPackageManager { get; }
-        IPackagePathResolver LocalPathResolver { get; }
-    }
-}
diff --git a/src/Umbraco.Core/Persistence/Repositories/Implement/StylesheetRepository.cs b/src/Umbraco.Core/Persistence/Repositories/Implement/StylesheetRepository.cs
index 8a0333a965..73dcb44fef 100644
--- a/src/Umbraco.Core/Persistence/Repositories/Implement/StylesheetRepository.cs
+++ b/src/Umbraco.Core/Persistence/Repositories/Implement/StylesheetRepository.cs
@@ -139,7 +139,7 @@ namespace Umbraco.Core.Persistence.Repositories.Implement
             FileSystem.AddFile(filepath, content, true);
         }
 
-        public long GetFileSize(string filepath)
+        public new long GetFileSize(string filepath)
         {
             if (FileSystem.FileExists(filepath) == false) return -1;
 
diff --git a/src/Umbraco.Core/Security/MachineKeyGenerator.cs b/src/Umbraco.Core/Security/MachineKeyGenerator.cs
index 283ca1ac3a..a20f04c919 100644
--- a/src/Umbraco.Core/Security/MachineKeyGenerator.cs
+++ b/src/Umbraco.Core/Security/MachineKeyGenerator.cs
@@ -26,8 +26,6 @@ namespace Umbraco.Core.Security
     validation=""HMACSHA256"" decryption=""AES""
     />";
 
-            var Xxx = 3;
-
             return string.Format(c, GenerateAESDecryptionKey(), GenerateHMACSHA256ValidationKey());
         }
 
diff --git a/src/Umbraco.Core/Services/Implement/MemberService.cs b/src/Umbraco.Core/Services/Implement/MemberService.cs
index f8245f18c2..ca2b39dee2 100644
--- a/src/Umbraco.Core/Services/Implement/MemberService.cs
+++ b/src/Umbraco.Core/Services/Implement/MemberService.cs
@@ -186,8 +186,9 @@ namespace Umbraco.Core.Services.Implement
         /// <param name="email">Email of the <see cref="IMembershipUser"/> to create</param>
         /// <param name="passwordValue">This value should be the encoded/encrypted/hashed value for the password that will be stored in the database</param>
         /// <param name="memberTypeAlias">Alias of the Type</param>
+        /// <param name="isApproved"></param>
         /// <returns><see cref="IMember"/></returns>
-        IMember IMembershipMemberService<IMember>.CreateWithIdentity(string username, string email, string passwordValue, string memberTypeAlias, bool isApproved = true)
+        IMember IMembershipMemberService<IMember>.CreateWithIdentity(string username, string email, string passwordValue, string memberTypeAlias, bool isApproved)
         {
             return CreateMemberWithIdentity(username, email, username, passwordValue, memberTypeAlias, isApproved);
         }
diff --git a/src/Umbraco.Core/Services/Implement/UserService.cs b/src/Umbraco.Core/Services/Implement/UserService.cs
index 4b27fb5c51..96cac1d814 100644
--- a/src/Umbraco.Core/Services/Implement/UserService.cs
+++ b/src/Umbraco.Core/Services/Implement/UserService.cs
@@ -198,7 +198,7 @@ namespace Umbraco.Core.Services.Implement
                 {
                     return _userRepository.GetByUsername(username, includeSecurityData: true);
                 }
-                catch (DbException ex)
+                catch (DbException)
                 {
                     // fixme - refactor users/upgrade
                     // currently kinda accepting anything on upgrade, but that won't deal with all cases
@@ -727,7 +727,7 @@ namespace Umbraco.Core.Services.Implement
                 {
                     return _userRepository.Get(id);
                 }
-                catch (DbException ex)
+                catch (DbException)
                 {
                     // fixme - refactor users/upgrade
                     // currently kinda accepting anything on upgrade, but that won't deal with all cases
diff --git a/src/Umbraco.Core/StringExtensions.cs b/src/Umbraco.Core/StringExtensions.cs
index a399c82f0c..4369e8faac 100644
--- a/src/Umbraco.Core/StringExtensions.cs
+++ b/src/Umbraco.Core/StringExtensions.cs
@@ -164,7 +164,7 @@ namespace Umbraco.Core
                 var obj = JsonConvert.DeserializeObject(input);
                 return obj;
             }
-            catch (Exception ex)
+            catch (Exception)
             {
                 return input;
             }
@@ -622,7 +622,7 @@ namespace Umbraco.Core
                 byte[] decodedBytes = UrlTokenDecode(input);
                 return decodedBytes != null ? Encoding.UTF8.GetString(decodedBytes) : null;
             }
-            catch (FormatException ex)
+            catch (FormatException)
             {
                 return null;
             }
diff --git a/src/Umbraco.Core/Umbraco.Core.csproj b/src/Umbraco.Core/Umbraco.Core.csproj
index e8a5a3654b..42e532869b 100644
--- a/src/Umbraco.Core/Umbraco.Core.csproj
+++ b/src/Umbraco.Core/Umbraco.Core.csproj
@@ -836,9 +836,7 @@
     <Compile Include="ObjectExtensions.cs" />
     <Compile Include="Collections\OrderedHashSet.cs" />
     <Compile Include="Packaging\ConflictingPackageData.cs" />
-    <Compile Include="Packaging\DefaultPackageContext.cs" />
     <Compile Include="Packaging\IConflictingPackageData.cs" />
-    <Compile Include="Packaging\IPackageContext.cs" />
     <Compile Include="Packaging\IPackageExtraction.cs" />
     <Compile Include="Packaging\IPackageInstallation.cs" />
     <Compile Include="Packaging\Models\UninstallationSummary.cs" />