public class MyBaseClass(string s); // no body required

class Foo;

struct Bar;

interface IFoo;

[ApiController]
[Route("api/[controller]")]
public class GenericController<T> : ControllerBase where T : BaseModel

public class Customer
{
    public string Name { get; set; }
}
public class Order
{
    public Customer Customer { get; set; }
}

public class Customer
{
    public string Name { get; set; }
    public ICollection<Order> Orders { get; set; }
}
public class Order
{
    public Customer Customer { get; set; }
}

 @Html.TextBoxFor(x => x.Name, new { @class = "form-control" })