本文介绍了无法转换List< KeyValuePair< ...,...>>到IEnumerable< object>吗?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
尝试这样的操作时获取InvalidCastException:
Getting an InvalidCastException when trying something like this :
IEnumerable<object> test = (IEnumerable<object>)new List<KeyValuePair<string, int>>();
但是,这确实可行:
IEnumerable<object> test = (IEnumerable<object>)new List<Dictionary<string, int>>();
那么最大的区别是什么?为什么不能将KeyValuePair转换为对象?
So what's the big difference? Why can a KeyValuePair not be converted to an object?
更新:我可能应该指出这确实有效:
Update: I should probably point out that this did work:
object test = (object)KeyValuePair<string,string>;
推荐答案
因为它是结构而不是类: http://msdn.microsoft.com/zh-cn/library/5tbh8a42.aspx
Because it is a struct, and not a class : http://msdn.microsoft.com/en-us/library/5tbh8a42.aspx
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