“具有相同键的项目”例外;枚举键的字典

Question

I've got a Dictionary<TKey,TValue> into which I'm inserting a lot of data. The keys are an enum. I keep getting this exception:

An item with the same key has already been added.

But I don't see any dupes, although I suspect some of my enums have the same value. Would that cause a duplicate key error? I thought an enum was a special type, so it's value wouldn't matter.

The exception isn't very helpful...it doesn't tell me which key is tripping the dupe. I'm using an initializer list.

---

Edit: Used some regex magic to convert my initializer list into separate .Add calls. Found the key, but I'm still not seeing the dupe...

Answer 1

如果枚举的多个成员具有相同的数字表示形式，则可能是异常的原因。

Answer 2

By default the numeric representation of Enums increment so unless you are specifying duplicate values there shouldn't be any.

Try running the below replacing by T with your enum and see if any of the values conflict.

return Enum.GetValues(typeof(T));

If not then the only alternative I see is that you are using an enum as a key twice.