Entity Framework Core - EF Core 2.2 - 'Point.Boundary' is of an interface type ('IGeometry') - entity-framework-core-2.1

Question

I am trying the new functionality with EF Core 2.2. It is based on the following article. "Announcing Entity Framework Core 2.2"
https://blogs.msdn.microsoft.com/dotnet/2018/12/04/announcing-entity-framework-core-2-2/
I installed the following Nuget package.
I added the following to my model.
using NetTopologySuite.Geometries;
//New as of EF.Core 2.2
//[Required]
//[NotMapped]
public Point Location { get; set; }
During my application startup I get the following error in my Database Context on the following line:
Database.EnsureCreated();
System.InvalidOperationException
HResult=0x80131509
Message=The property 'Point.Boundary' is of an interface type ('IGeometry'). If it is a navigation property manually configure the relationship for this property by casting it to a mapped entity type, otherwise ignore the property using the NotMappedAttribute or 'EntityTypeBuilder.Ignore' in 'OnModelCreating'.
Source=Microsoft.EntityFrameworkCore

Answer 1

You need to call UseNetTopologySuite(). Example here:
public class ApplicationDbContext : IdentityDbContext
{
public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)
: base(options)
{
}
protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
IConfigurationRoot configuration = new ConfigurationBuilder()
.SetBasePath(Directory.GetCurrentDirectory())
.AddJsonFile("appsettings.json")
.Build();
var connectionString = configuration.GetConnectionString("DefaultConnection");
optionsBuilder.UseSqlServer(connectionString, opts => opts.UseNetTopologySuite());
}
public DbSet<Test> Tests { get; set; }
}
public class Test
{
public int Id { get; set; }
public Point Location { get; set; }
}
I ran into this problem because I had a
if (!optionsBuilder.IsConfigured) around everything in my OnConfiguring. I had to remove this in order to get add-migrations to work.

Answer 2

As Kyle pointed out you need to call UseNetTopologySuite(), but I would call it during ConfigureServices like this:
public class Startup
{
public void ConfigureServices(IServiceCollection services)
{
services
.AddEntityFrameworkNpgsql()
.AddDbContext<MyDBContext>(opt =>
opt.UseNpgsql(Configuration.GetConnectionString("MyDBConnection"),
o=>o.UseNetTopologySuite()))
.BuildServiceProvider();
...
}
...
}