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<?xml version="1.0" encoding="utf-8"?>
<edmx:Edmx Version="4.0" xmlns:edmx="http://docs.oasis-open.org/odata/ns/edmx">
    <edmx:DataServices>
        <Schema Namespace="ODataApiVersion.Models.v1" xmlns="http://docs.oasis-open.org/odata/ns/edm">
            <EntityType Name="Customer">
                <Key>
                    <PropertyRef Name="Id" />
                </Key>
                <Property Name="Name" Type="Edm.String" />
                <Property Name="PhoneNumber" Type="Edm.String" />

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{
  "@odata.context":"http://localhost:5001/odata/$metadata#Books(ISBN,Location,Press(Name))",
  "value":[
    {
      "ISBN":"063-6-920-02371-5",
      "Location":{
        "Street":"Main ST"
      },
      "Press":{
        "Name":"O'Reilly"

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{
  "@odata.context":"http://localhost:5001/odata/$metadata#Books/$entity",
  "Id":2,
  "ISBN":"063-6-920-02371-5",
  "Title":"Enterprise Games",
  "Author":"Michael Hugos",
  "Price":49.99,
  "Location":{
    "City":"Bellevue",
    "Street":"Main ST"

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public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    if (env.IsDevelopment())
    {
        app.UseDeveloperExceptionPage();
    }

    app.UseRouting();

    app.UseEndpoints(endpoints =>

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public void ConfigureServices(IServiceCollection services)
{
    services.AddDbContext<BookStoreContext>(opt => opt.UseInMemoryDatabase("BookLists"));
    services.AddControllers();
    services.AddOData();
}

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<Project Sdk="Microsoft.NET.Sdk.Web">

  <PropertyGroup>
    <TargetFramework>netcoreapp5.0</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.AspNetCore.OData" Version="7.4.0-beta" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="5.0.0-preview.2.20159.4" />
  </ItemGroup>

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<Project Sdk="Microsoft.NET.Sdk.Web">

  <PropertyGroup>
    <TargetFramework>netcoreapp2.1</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <Folder Include="wwwroot\" />
  </ItemGroup>

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public class BookStoreContext : DbContext
{
   public BookStoreContext(DbContextOptions<BookStoreContext> options)
     : base(options)
   {
   }

   public DbSet<Book> Books { get; set; }
   public DbSet<Press> Presses { get; set; }

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public class Startup
{
  // ...
  public void ConfigureServices(IServiceCollection services)
  {
    services.AddDbContext<BookStoreContext>(opt => opt.UseInMemoryDatabase("BookLists"));
    services.AddOData();
    services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);
  }
}

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public static class DataSource
{
    private static IList<Book> _books { get; set; }

    public static IList<Book> GetBooks()
    {
        if (_books != null)
        {
            return _books;
        }