var result = db.Contacts
.IncludeEFU(db,x => x.PhoneNumbers
.Where(n => n.Number == "10134")
.OrderBy(p => p.ContactId)
.ThenByDescending(p => p.Number))
.ToList();

我尝试在我的VB.net应用程序上使用相同的代码：

Dim result = db.Contacts _
.IncludeEFU(db,Function(x) x.PhoneNumbers _
.Where(Function(n) n.Number = "10134")_
.OrderBy(Function(p) p.ContactId) _
.ThenByDescending(Function(p) p.Number)).ToList()

但我收到一个错误：

An unhandled exception of type 'System.ArgumentException' occurred in     EntityFramework.Utilities.dll

Additional information: Could not find a MemberExpression

逐个检查dll项目中的文件(可以在链接上下载),我看到我收到的错误消息来自这个子：

private static PropertyInfo SetCollectionModifiersAndGetChildProperty<T,TChild>(Expression<Func<T,IEnumerable<TChild>>> collectionSelector,List<MethodCallExpression> childCollectionModifiers)
        where T : class
        where TChild : class
    {
        var temp = collectionSelector.Body;
        while (temp is MethodCallExpression)
        {
            var mce = temp as MethodCallExpression;
            childCollectionModifiers.Add(mce);
            temp = mce.Arguments[0];
        }
        childCollectionModifiers.Reverse(); //We parse from right to left so reverse it
        if (!(temp is MemberExpression))
        {
            throw new ArgumentException("Could not find a MemberExpression","collectionSelector");
        }

        var childProp = (temp as MemberExpression).Member as PropertyInfo;
        return childProp;
    }

看看这一行：

throw new ArgumentException("Could not find a MemberExpression","collectionSelector");

为什么这是在C#项目上工作,并在VB.net项目上产生这个错误？
我该如何解决这个问题？
谢谢 ！

编辑：我尝试在该子目录中进行一些更改：

...

    while (temp is MethodCallExpression)
            {
                var mce = temp as MethodCallExpression;
                childCollectionModifiers.Add(mce);
                temp = mce.Arguments[0];
            }
        while (temp is UnaryExpression)
        {
            var ue = temp as UnaryExpression;
            temp = ue.Operand;
        }
        .....

重建dll文件后,现在错误消息消失了.
但任何人都可以确认这是一个正确的解决方案吗？