only support netstandard2.0

drop explicit net452 support

Author: SimonCropp

Directory.Build.props

@@ -3,7 +3,7 @@
   <PropertyGroup>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <LangVersion>latest</LangVersion>
-    <AssemblyVersion>2.0.1</AssemblyVersion>
+    <Version>3.0.0</Version>
     <PackageLicenseUrl>http://www.opensource.org/licenses/mit-license.php</PackageLicenseUrl>
     <PackageRequireLicenseAcceptance>false</PackageRequireLicenseAcceptance>
     <Copyright>Copyright $([System.DateTime]::UtcNow.ToString(yyyy)). All rights reserved</Copyright>

NServiceBus.ProtoBuf/NServiceBus.ProtoBuf.csproj

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?><Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net452;netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0</TargetFrameworks>
     <NoWarn>CS1591</NoWarn>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>

Sample/Sample.csproj

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net47;netcoreapp2.0</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.1</TargetFrameworks>
     <OutputType>Exe</OutputType>
   </PropertyGroup>
   <ItemGroup>

Tests/Tests.csproj

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net47;netcoreapp2.0</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.1</TargetFrameworks>
     <DebugType>full</DebugType>
     <DebugSymbols>True</DebugSymbols>
   </PropertyGroup>

appveyor.yml

@@ -1,17 +1,8 @@
 image: Visual Studio 2017
-configuration: Release
-platform: Any CPU
-install:
-- cmd: appveyor downloadfile https://dist.nuget.org/win-x86-commandline/latest/nuget.exe
-before_build:
-- ps: nuget restore
-build:
-  verbosity: minimal
+build_script:
+- cmd: dotnet build --configuration Release
 test_script:
 - cmd: >-
-    %xunit20%\xunit.console Tests\bin\Release\net47\Tests.dll
-
-    dotnet test "Tests\Tests.csproj" --framework netcoreapp2.0 --configuration Release --no-build --output bin\Release\netcoreapp2.0
-
+    dotnet test "Tests\Tests.csproj" --configuration Release --no-build
 artifacts:
 - path: nugets\**\*.nupkg

readme.md

@@ -6,6 +6,27 @@ NServiceBus.ProtoBuf
 Add support for [NServiceBus](https://docs.particular.net/nservicebus/) message serialization via [ProtoBuf](https://github.com/mgravell/protobuf-net)
 
 
+<!--- StartOpenCollectiveBackers -->
+
+## Community backed
+
+**This is a community backed project. Backing is done via [opencollective.com/nservicebusextensions](https://opencollective.com/nservicebusextensions/).**
+
+**It is expected that any developer that uses any of these libraries [become at a backer](https://opencollective.com/nservicebusextensions#contribute).** This is an honesty system, there is no code that enforces this requirement. However when raising an issue or a pull request, the GitHub users name may be checked against [the list of backers](https://github.com/NServiceBusExtensions/Home/blob/master/backers.md), and that issue/PR may be closed without further examination.
+
+
+### Backers
+
+Thanks to all the backers! [[Become a backer](https://opencollective.com/nservicebusextensions#contribute)]
+
+<a href="https://opencollective.com/nservicebusextensions#contribute" target="_blank"><img src="https://opencollective.com/nservicebusextensions/tiers/backer.svg"></a>
+
+[<img src="https://opencollective.com/nservicebusextensions/donate/[email protected]?color=blue" width="200px">](https://opencollective.com/nservicebusextensions#contribute)
+
+<!--- EndOpenCollectiveBackers -->
+
+
+
 ## The nuget package  [![NuGet Status](https://img.shields.io/nuget/v/NServiceBus.ProtoBuf.svg?style=flat)](https://www.nuget.org/packages/NServiceBus.ProtoBuf/)
 
 https://nuget.org/packages/NServiceBus.ProtoBuf/