C＃动态对象初始化不会编译

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下面的代码似乎是合理的我。它应该创建对象，然后使用动态功能，让我指定我喜欢的任何属性。但是编译器说：ExpandoObject不包含测试的定义。要我说，我知道，那是该死的地步！

动态例如=新ExpandoObject {。测试=失败};

任何想法，为什么CSC是不是不允许这样做。

$ B $ ：b

另一种方法是手动展开代码到单独的属性分配

动态例如=新ExpandoObject（）; example.Test =不及格;

而烦恼时，我有很多的属性来分配的。

解决方案

在对象初始化，类型是 ExpandoObject ，而不是动态，这样你就不会得到动态功能。的之后的初始化，您是在类型的变量操作动态等动态功能的是可用那里。

The following code seems reasonable to me. It should create the object and then use the dynamic features to let me assign any properties I like. However the compiler says that "ExpandoObject does not contain a definition for Test". To which I say, "I know, that's the freaking point!"

dynamic example = new ExpandoObject { Test = "fail" };

Any ideas why csc isn't allowing this.

The alternative is to manually expand the code into individual property assignments.

dynamic example = new ExpandoObject(); example.Test = "fail";

Which is annoying when I have lots of properties to assign.

解决方案

Within the object initializer, the type is ExpandoObject, not dynamic, so you don't get dynamic functionality. After the initializer, you are operating on a variable of type dynamic and so dynamic functionality is available there.