从System.Collections.Generic.Dictionary`2 [System.Object，System.Object]中读取数据

Question

I'm struggling to read data out of an IDictionary and would really appreciate some help. I've pulled out other data I need when it was just an object array, but I've got a KeyValuePair to deal with now. When I try and cast it as a KeyValuePair, I get an InvalidCastException so I did this to try and find the type:

var test = plist["CFBundleIcons"];
MessageBox.Show(test.GetType().ToString());

Which returned System.Collections.Generic.Dictionary`2[System.Object,System.Object] . My first question is what does the 2 mean? I've used dictionaries in the past and have never seen this before.

If it helps understand my main problem further, I've attached a screenshot of the locals view below - I'm trying to read the icon names. Thanks in advance.

Answer 1

This is how the CLR encodes generic type names. `2 indicates the number of type parameters in the type.

In C# terms, this is Dictionary<object, object> .

Answer 2

It's just how .NET encodes a name of a generic type with two type parameters. plist["CFBundleIcons"] is a Dictionary<object, object> . So instead of casting it to KeyValuePair , you should cast it to the correct type.