铸造接收到的对象到List＆LT;对象＆gt;或IEnumerable的＆LT;对象＆gt; [英] Cast received object to a List<object> or IEnumerable<object>

问题描述

我想执行以下投

private void MyMethod(object myObject)  
{  
    if(myObject is IEnumerable)  
    {
        List<object> collection = (List<object>)myObject;  
        ... do something   
    }  
    else  
    {  
        ... do something  
    }  
}

但我总是落得以下excepction：

But I always end up with the following excepction:

无法转换类型的对象System.Collections.Generic.List 1 [MySpecificType]'输入'System.Collections.Generic.List 1 [System.Object的]

Unable to cast object of type 'System.Collections.Generic.List1[MySpecificType]' to type 'System.Collections.Generic.List1[System.Object]'

我真的需要这个工作，因为这种方法需要非常通用的接受单个对象和集合两种不明类型。

I really need this to work because this method needs to be very generic to receive single objects and collections both of unspecified types.

这是可能的，或者是有完成此的另一种方式。

Is this possible, or is there another way of accomplishing this.

感谢你。

推荐答案

C＃4将有协变和逆变模板参数，但在那之前，你必须做一些非通用像

C# 4 will have covariant and contravariant template parameters, but until then you have to do something nongeneric like

IList collection = (IList)myObject;

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