<ItemGroup>
   <DotNetCliToolReference Include="Microsoft.DotNet.Watcher.Tools" Version="(all versions)" />
</ItemGroup>

public void ConfigureServices(IServiceCollection services)
{
    services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);
}

public enum CompatibilityVersion
{
   Version_2_0 = 0,
   Version_2_1 = 1,
   Latest = int.MaxValue
}

services.AddMvc()
   .SetCompatibilityVersion(CompatibilityVersion.Version_2_1) // Give me all of the 2.1 behaviors
   .AddMvcOptions(options =>
   {
      options.AllowCombiningAuthorizeFilters = false; // don't combine authorize filters (keep 2.0 behavior)
      options.AllowEmptyInputInBodyModelBinding = false; // shouldn't treat empty input as valid.
   });

<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
    <TargetFramework>netstandard2.0</TargetFramework>
    <ResolvedRazorCompileToolset>RazorSdk</ResolvedRazorCompileToolset>
    <RazorCompileOnBuild>true</RazorCompileOnBuild>
    <IncludeContentInPack>false</IncludeContentInPack>
  </PropertyGroup>
<ItemGroup>
    <Content Include="Pages\**\*.cshtml" />
  </ItemGroup>
<ItemGroup>
    <PackageReference Include="Microsoft.AspNetCore.Mvc" Version="2.1.0-preview1-final" />
  </ItemGroup>
</Project>

public class UserModel   
{
   [Required, EmailAddress]
   public string Email { get; set; }
 
   [Required, StringLength(1000)]
   public string Name { get; set; }
}

public IActionResult SaveUser(UserModel model)
{
     if(!ModelState.IsValid)
     {

public IActionResult SaveUser(
     [Required, EmailAddress] string Email  
     [Required, StringLength(1000)] string Name)
{
    if(!ModelState.IsValid)

public IActionResult Get([BindRequired, FromRoute] Guid testId, [BindRequired, FromQuery] int qty)   
{
   if(!ModelState.IsValid)

npm install stacktrace-js --save
npm install @types/stacktrace-js --save-dev