Changed to netcoreapp2.0

SandboxDriver/SandboxDriver.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp2.1;net45</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.0;net45</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>

TestBench/TestBench.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <TargetFramework>netcoreapp2.0</TargetFramework>
     <GenerateFullPaths>True</GenerateFullPaths>
   </PropertyGroup>
 

Topten.RichTextKit.Test/Topten.RichTextKit.Test.csproj

@@ -3,7 +3,7 @@
   <Import Project="../common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <TargetFramework>netcoreapp2.0</TargetFramework>
     <IsPackable>false</IsPackable>
   </PropertyGroup>
 

Topten.RichTextKit/Topten.RichTextKit.csproj

@@ -3,7 +3,7 @@
   <Import Project="../common.props" />
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp2.1;net45</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.0;net45</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <DocumentationFile>$(OutputPath)\$(AssemblyName).xml</DocumentationFile>
     <Authors>Topten Software</Authors>