release version of asp.net core

Author: Garvin

src/aspnet-core-sample/aspnet-core-sample.csproj

@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.AspNetCore.All" Version="2.0.0-preview2-final" />
+    <PackageReference Include="Microsoft.AspNetCore.All" Version="2.0.0" />
   </ItemGroup>
 
   <ItemGroup>