Reference to type IdentityBuilder claims it is defined in microsoft.aspnetcore.identity but it could not be found

I'm getting this error when upgraded csproj to netstandard1.2 then come NuGet package upgrade in csproj.  This csproj is a dependency DLL to the 3 WebApp csproj.

Error --> Reference to type IdentityBuilder claims it is defined in microsoft.aspnetcore.identity but it could not be found

I'm a bit stump & not having much luck after 2 days of Google search but found this one link at https://forums.asp.net/t/2162412.aspx?Error+with+aspnetcore+3+1+identity+

public static void AddPaymentsForPortal<TRequestContext, TUserContext>(this IServiceCollection services, IConfiguration configuration, IEnumerable<EmbeddedAssemblySource> embeddedViewAssemblies, PortalRoleType roleType)

{

     services.AddIdentity<ApplicationUser, IdentityRole<Guid>>()

    .AddEntityFrameworkStores<ApplicationContext, Guid>()

    .AddDefaultTokenProviders();

}

public class ApplicationContext : IdentityDbContext<ApplicationUser, IdentityRole<Guid>, Guid>

{

    public ApplicationContext(DbContextOptions<ApplicationContext> options) : base(options)

    {

    }

 protected override void OnModelCreating(ModelBuilder builder)

{

}

public class ApplicationUser : IdentityUser<Guid>, IUser

{

    public async Task<ClaimsIdentity> GenerateUserIdentityAsync(UserManager<ApplicationUser> manager)

    {

    }

}

<PackageReference Include="Microsoft.ApplicationInsights.AspNetCore" Version="2.0.0" />

<PackageReference Include="Microsoft.AspNetCore.DataProtection" Version="3.1.3" />

<PackageReference Include="Microsoft.AspNetCore.DataProtection.AzureStorage" Version="1.0.2" />

<PackageReference Include="Microsoft.AspNetCore.Diagnostics" Version="1.1.2" />

<PackageReference Include="Microsoft.AspNetCore.HttpOverrides" Version="1.1.2" />

<PackageReference Include="Microsoft.AspNetCore.Identity" Version="2.2.0" />

<PackageReference Include="Microsoft.AspNetCore.Mvc.Formatters.Xml" Version="1.1.3" />

<PackageReference Include="Microsoft.AspNetCore.Session" Version="1.1.2" />

<PackageReference Include="Microsoft.AspNetCore.StaticFiles" Version="1.1.2" />

<PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="1.1.2" />

<PackageReference Include="Microsoft.Extensions.Caching.Redis" Version="1.1.2" />

<PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="3.1.3" />

<PackageReference Include="Microsoft.Extensions.Configuration.CommandLine" Version="3.1.3" />

<PackageReference Include="Microsoft.Extensions.FileProviders.Embedded" Version="1.1.1" />

<PackageReference Include="Microsoft.Extensions.Hosting" Version="3.1.3" />