如何从C#中的DLL中获取类型列表?

using System.Reflection;

...

static void Main(string[] args)
{
    Assembly SampleAssembly;
    SampleAssembly = Assembly.LoadFrom("C:\\MyAssembly.dll"); //error happens here

    foreach (Type tp in SampleAssembly.GetTypes())
    {
        Console.WriteLine(tp.Name);
    }
}

/*
This will give me:
Unable to load one or more of the requested types.
Retrieve the LoaderExceptions property for more information.

I wish it would give me something like this:
MyClass1
MyClass2
MyClass3
*/