Issues after migration of Asp.Net Core RC1 to RC2

We have migrated our project from Asp.Net core RC1 to RC2. We are getting 2 compilation errors in the following places after the migrations.

First Issue is in the startup.cs, "The call is ambiguous between the following methods or properties:"

public void ConfigureServices(IServiceCollection services)
{

...

services.AddIdentity<ApplicationUser, IdentityRole>()
       .AddEntityFrameworkStores<ApplicationDbContext>()
       .AddDefaultTokenProviders();


       ...
}

Error Details:

Error   CS0121  The call is ambiguous between the following methods or properties: 'Microsoft.Extensions.DependencyInjection.IdentityServiceCollectionExtensions.AddIdentity<TUser, TRole>(Microsoft.Extensions.DependencyInjection.IServiceCollection)' and 'Microsoft.Extensions.DependencyInjection.IdentityServiceCollectionExtensions.AddIdentity<TUser, TRole>(Microsoft.Extensions.DependencyInjection.IServiceCollection)'  Firebolt.SecurityService..NETCoreApp,Version=v1.0   C:\Krishnan\RSI\SourceCode\Bluesky Developement\BlueSky Development\Firebolt.Security\src\Firebolt.Security\Startup.cs  58  Active

Second Issue:

[Microsoft.Data.Entity.Infrastructure.DbContext(typeof(ApplicationDbContext))]
    [Migration("00000000000000_CreateIdentitySchema")]
    partial class CreateIdentitySchema
    {
        protected override void BuildTargetModel(Microsoft.EntityFrameworkCore.ModelBuilder modelBuilder)
        {
     ...
}

Error Details:

 Error  CS0115  'CreateIdentitySchema.BuildTargetModel(ModelBuilder)': no suitable method found to override Firebolt.SecurityService..NETCoreApp,Version=v1.0   C:\Krishnan\RSI\SourceCode\Bluesky Developement\BlueSky Development\Firebolt.Security\src\Firebolt.Security\Migrations\00000000000000_CreateIdentitySchema.Designer.cs  15  Active

What is the fix for these 2 issues? any ideas