反射,获取显式接口属性“backing field”名称

有没有办法获得显式接口属性支持字段的名称?

例如,对于:

public interface I
{
    string PPPP { get; }
}

public class C: I
{
    private string _other_field = default!; // random private field, just to fill.
    public string S => _s_backing; // random property, just to fill.

    private string _s_backing = default!;
    string I.PPPP => _s_backing; // <--- looking for this one!
}

对于财产 PPPP 我想弄清楚 "_s_backing" 。

我是说。是否有方法创建此帮助程序:

Helpers.DoSomeReflectionMagic( typeof(C), "PPPP" ) 
// I expect, it returns: `_s_backing`.

我试过的:我在挖掘 typeof(C) 属性,但我在任何地方都找不到支持字段。也许没有办法得到它。

潜在的XY问题:

public interface ITree<T>
{
    T? Parent { get; }
    IEnumerable<T> Children { get; }
}

public class Category: ITree<Category>
{
    public string Name { get; set; }
    public Category? MyParentCategory { get; set; }
    public IEnumerable<Category> MySubCategories { get; set; }

    // Implementing interface
    Category? ITree<Category>.Parent => MyParentCategory;;
    IEnumerable<Category> ITree<Category>.Children => MySubCategories;
}

// dbcontext with fluent api to configure model blah blah

public static class DbContextTreeExtensions
{
    public static IEnumerable<T> GetRoots<T>(this MyDbContext ctx)
    {
        var backingfieldname =  // <-- The Y problem
            Helpers
            .DoSomeReflectionMagic(typeof(T), "Parent");

        return
            ctx
            .Set<T>()
            .Where(q => EF.Property<T?>(q, backingfieldname) == null)
            .AsEnumerable();
    }
}

我想做:

var ctx = MyDbContextFactory.NewContext();
var mainCategories = ctx.GetRoots<Category>();