如何使用MEF导入多个实例？

using System;
using System.ComponentModel.Composition;
using System.ComponentModel.Composition.Hosting;

// 定义需要导入的接口
public interface IMyInterface
{
    void DoSomething();
}

// 实现导入的接口
[Export(typeof(IMyInterface))]
public class MyImplementation1 : IMyInterface
{
    public void DoSomething()
    {
        Console.WriteLine("Implementation 1");
    }
}

[Export(typeof(IMyInterface))]
public class MyImplementation2 : IMyInterface
{
    public void DoSomething()
    {
        Console.WriteLine("Implementation 2");
    }
}

public class MyClass
{
    // 导入多个实例
    [ImportMany]
    public IMyInterface[] MyImplementations { get; set; }

    public void DoSomethingWithImplementations()
    {
        // 创建MEF容器
        var container = new CompositionContainer();
        // 导入实例
        container.ComposeParts(this);

        // 使用导入的实例
        foreach (var implementation in MyImplementations)
        {
            implementation.DoSomething();
        }
    }
}

public class Program
{
    public static void Main()
    {
        var myClass = new MyClass();
        myClass.DoSomethingWithImplementations();
    }
}