使用c#从c++访问COM接口会产生错误

我有一个c++项目，它将调用一个c#函数，然后c#将调用一个c++函数(都有返回值)。我被困在COM接口，有人在这里stackoverflow给了我(我没有太多的经验在c++或c#，只有java)，但由于某种原因，它给了我一个错误，当我试图编译c++代码，致命错误C1196: 'FaceTrackingBasics-WPF':标识符在类型库c:FaceTrackingBasics-WPF/bin/x86/Debug/FaceTrackingBasics-WPF。tlb'不是一个有效的c++标识符。

你能发现一些错误吗?也许我不应该在一个文件中有两个类?顺便说一句，c#代码与窗口相关联，我不知道它是否会导致问题。由于

    // --------------------------------------------------------------------------------                ------------------------------------
    // <copyright file="FaceTrackingViewer.xaml.cs" company="Microsoft">
    //     Copyright (c) Microsoft Corporation.  All rights reserved.
    // </copyright>
    // --------------------------------------------------------------------------------        ------------------------------------
    namespace FaceTrackingBasics
    {
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using Microsoft.Kinect;
using Microsoft.Kinect.Toolkit.FaceTracking;
using System.Globalization;
/////
using System.Runtime.InteropServices;

using Point = System.Windows.Point;
/// <summary>
/// Class that uses the Face Tracking SDK to display a face mask for
/// tracked skeletons
/// </summary>
public partial class FaceTrackingViewer : UserControl, IDisposable
{
    public static readonly DependencyProperty KinectProperty = DependencyProperty.Register(
        "Kinect", 
        typeof(KinectSensor), 
        typeof(FaceTrackingViewer), 
        new PropertyMetadata(
            null, (o, args) => ((FaceTrackingViewer)o).OnSensorChanged((KinectSensor)args.OldValue, (KinectSensor)args.NewValue)));
    private const uint MaxMissedFrames = 100;

    private Boolean drawFlat = false;
    public FaceTrackingViewer()
    {
        this.InitializeComponent();
    }
    ~FaceTrackingViewer()
    {
        this.Dispose(false);
    }
    public KinectSensor Kinect
    {
        get
        {
            return (KinectSensor)this.GetValue(KinectProperty);
        }
        set
        {
            this.SetValue(KinectProperty, value);
        }
    }
    public void Dispose()
    {
        this.Dispose(true);
        GC.SuppressFinalize(this);
    }

    //i deleted the rest of the code, i dont think its relevant
    }
}
//***********************//
[ComVisible(true)]
[Guid("2EF06BCB-A25B-41AD-B233-33A956DBEB69")]
public struct Ponto
{
    public double x;
    public double y;
    public Ponto(double x, double y)
    {
        this.x = x;
        this.y = y;
    }
}
[ComVisible(true)]
[Guid("EB9258F5-DCFB-4F91-8342-5A05EB17557D")]
public interface IManagedClass
{
    Ponto[] Foo();
}
[ComVisible(true)]
[Guid("11B23AD7-F79E-45D7-BC87-89F0DBC8B83F")]
[ClassInterface(ClassInterfaceType.None)]
public class ManagedClass : IManagedClass
{
    private List<Ponto> points;
    public ManagedClass()
    {
        points = new List<Ponto>();
        points.Add(new Ponto(1.0, 1.0));
        points.Add(new Ponto(2.0, 2.0));
        points.Add(new Ponto(3.0, 3.0));
    }
    public Ponto[] Foo()
    {
        return points.ToArray();
    }
}

   #include "stdafx.h"
   #import        "C:/Users/Pedro/Dropbox/0000000TESE/000_visual_studio/0FaceTMS/FaceTrackingBasics-              WPF/bin/x86/Debug/FaceTrackingBasics-WPF.tlb"
   #include <iostream>
   using namespace FaceTrackingBasics;
   using namespace std;
   int main()
   {
::CoInitialize(NULL);
{
    IManagedClassPtr pManagedClass(__uuidof(ManagedClass));
    SAFEARRAY* psa = pManagedClass->Foo();
    Ponto* pPoints = (Ponto*)psa->pvData;
    for (int i = 0; i < 3; ++i)
        cout << pPoints[i].x << " " << pPoints[i].y << endl;
}
::CoUninitialize();
 }