Separate previewer properties

Author: kekekeks

packages/Avalonia/Avalonia.props

@@ -1,10 +1,6 @@
-<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <PropertyGroup Condition=" $(TargetFramework.StartsWith('netcore')) ">
-    <AvaloniaPreviewerToolPath>$(MSBuildThisFileDirectory)\..\..\tools\netcoreapp2.0\designer\Avalonia.Designer.HostApp.dll</AvaloniaPreviewerToolPath>
-    <AvaloniaPreviewerStartMode>dotnet exec</AvaloniaPreviewerStartMode>
-  </PropertyGroup>
-  <PropertyGroup Condition=" !$(TargetFramework.StartsWith('netcore')) ">
-    <AvaloniaPreviewerToolPath>$(MSBuildThisFileDirectory)\..\..\tools\net461\designer\Avalonia.Designer.HostApp.exe</AvaloniaPreviewerToolPath>
-    <AvaloniaPreviewerStartMode>exe</AvaloniaPreviewerStartMode>
+<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <AvaloniaPreviewerNetCoreToolPath>$(MSBuildThisFileDirectory)\..\tools\netcoreapp2.0\designer\Avalonia.Designer.HostApp.dll</AvaloniaPreviewerNetCoreToolPath>
+    <AvaloniaPreviewerNetFullToolPath>$(MSBuildThisFileDirectory)\..\tools\net461\designer\Avalonia.Designer.HostApp.exe</AvaloniaPreviewerNetFullToolPath>
   </PropertyGroup>
 </Project>