 -  </ItemGroup>
    <PropertyGroup Condition="'$(TargetFramework)' == 'netstandard1.0'">
      <AssemblyTitle>Json.NET .NET Standard 1.0</AssemblyTitle>
-     <DefineConstants>NETSTANDARD1_0;PORTABLE;HAVE_ASYNC;HAVE_COVARIANT_GENERICS;HAVE_DATA_CONTRACTS;HAVE_DATE_TIME_OFFSET;HAVE_DYNAMIC;HAVE_EXPRESSIONS;HAVE_FSHARP_TYPES;HAVE_GUID_TRY_PARSE;HAVE_HASH_SET;HAVE_IGNORE_DATA_MEMBER_ATTRIBUTE;HAVE_IMMUTABLE_COLLECTIONS;HAVE_INOTIFY_COLLECTION_CHANGED;HAVE_ISET;HAVE_LINQ;HAVE_METHOD_IMPL_ATTRIBUTE;HAVE_READ_ONLY_COLLECTIONS;HAVE_REFLECTION_BINDER;HAVE_SERIALIZATION_BINDER_BIND_TO_NAME;HAVE_STRING_JOIN_WITH_ENUMERABLE;HAVE_TIME_SPAN_PARSE_WITH_CULTURE;HAVE_TIME_SPAN_TO_STRING_WITH_CULTURE;HAVE_TIME_ZONE_INFO;HAVE_TYPE_DESCRIPTOR;HAVE_UNICODE_SURROGATE_DETECTION;HAVE_VARIANT_TYPE_PARAMETERS;HAVE_VERSION_TRY_PARSE;HAVE_XLINQ;HAVE_OBSOLETE_FORMATTER_ASSEMBLY_STYLE;$(AdditionalConstants)</DefineConstants>
+     <DefineConstants>NETSTANDARD1_0;PORTABLE;HAVE_ASYNC;HAVE_COVARIANT_GENERICS;HAVE_DATA_CONTRACTS;HAVE_DATE_TIME_OFFSET;HAVE_DYNAMIC;HAVE_EXPRESSIONS;HAVE_FSHARP_TYPES;HAVE_GUID_TRY_PARSE;HAVE_HASH_SET;HAVE_IGNORE_DATA_MEMBER_ATTRIBUTE;HAVE_INOTIFY_COLLECTION_CHANGED;HAVE_ISET;HAVE_LINQ;HAVE_METHOD_IMPL_ATTRIBUTE;HAVE_READ_ONLY_COLLECTIONS;HAVE_REFLECTION_BINDER;HAVE_SERIALIZATION_BINDER_BIND_TO_NAME;HAVE_STRING_JOIN_WITH_ENUMERABLE;HAVE_TIME_SPAN_PARSE_WITH_CULTURE;HAVE_TIME_SPAN_TO_STRING_WITH_CULTURE;HAVE_TIME_ZONE_INFO;HAVE_TYPE_DESCRIPTOR;HAVE_UNICODE_SURROGATE_DETECTION;HAVE_VARIANT_TYPE_PARAMETERS;HAVE_VERSION_TRY_PARSE;HAVE_XLINQ;HAVE_OBSOLETE_FORMATTER_ASSEMBLY_STYLE;$(AdditionalConstants)</DefineConstants>
    </PropertyGroup>
 -  <ItemGroup Condition="'$(TargetFramework)' == 'netstandard1.3'">
 -    <PackageReference Include="System.Runtime.Serialization.Formatters" Version="4.3.0" />

-  </ItemGroup>
   <PropertyGroup Condition="'$(TargetFramework)' == 'netstandard1.3'">
     <AssemblyTitle>Json.NET .NET Standard 1.3</AssemblyTitle>
     <DefineConstants>NETSTANDARD1_3;PORTABLE;HAVE_ASYNC;HAVE_BIG_INTEGER;HAVE_BINARY_SERIALIZATION;HAVE_COVARIANT_GENERICS;HAVE_DATA_CONTRACTS;HAVE_DATE_TIME_OFFSET;HAVE_DYNAMIC;HAVE_EXPRESSIONS;HAVE_FSHARP_TYPES;HAVE_GUID_TRY_PARSE;HAVE_HASH_SET;HAVE_IGNORE_DATA_MEMBER_ATTRIBUTE;HAVE_IMMUTABLE_COLLECTIONS;HAVE_INOTIFY_COLLECTION_CHANGED;HAVE_ISET;HAVE_LINQ;HAVE_METHOD_IMPL_ATTRIBUTE;HAVE_NON_SERIALIZED_ATTRIBUTE;HAVE_READ_ONLY_COLLECTIONS;HAVE_REFLECTION_BINDER;HAVE_SERIALIZATION_BINDER_BIND_TO_NAME;HAVE_STRING_JOIN_WITH_ENUMERABLE;HAVE_TIME_SPAN_PARSE_WITH_CULTURE;HAVE_TIME_SPAN_TO_STRING_WITH_CULTURE;HAVE_TIME_ZONE_INFO;HAVE_TYPE_DESCRIPTOR;HAVE_UNICODE_SURROGATE_DETECTION;HAVE_VARIANT_TYPE_PARAMETERS;HAVE_VERSION_TRY_PARSE;HAVE_XLINQ;HAVE_OBSOLETE_FORMATTER_ASSEMBLY_STYLE;HAVE_XML_DOCUMENT;$(AdditionalConstants)</DefineConstants>

diff --git a/Src/Newtonsoft.Json/Newtonsoft.Json.csproj b/Src/Newtonsoft.Json/Newtonsoft.Json.csproj
index 497f78d..3f4014e 100644
--- a/Src/Newtonsoft.Json/Newtonsoft.Json.csproj
+++ b/Src/Newtonsoft.Json/Newtonsoft.Json.csproj
@@ -1,6 +1,6 @@
 ﻿<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks Condition="'$(LibraryFrameworks)'==''">net45;net40;net35;net20;netstandard1.0;netstandard1.3;netstandard2.0;portable-net45+win8+wpa81+wp8;portable-net40+win8+wpa81+wp8+sl5</TargetFrameworks>
+    <TargetFrameworks Condition="'$(LibraryFrameworks)'==''">net45;</TargetFrameworks>
     <TargetFrameworks Condition="'$(LibraryFrameworks)'!=''">$(LibraryFrameworks)</TargetFrameworks>
     <LangVersion>latest</LangVersion>
     <!-- version numbers will be updated by build -->
@@ -27,6 +27,8 @@
     <AssemblyName>Newtonsoft.Json</AssemblyName>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <MinClientVersion>2.12</MinClientVersion>
+    <SignAssembly>true</SignAssembly>
+    <AssemblyOriginatorKeyFile>..\..\..\json.net.custom.signkey.snk</AssemblyOriginatorKeyFile>
