Why can't I create a dictionary<string, dictionary<string,string>>?

i want to create a dictionary like:

开发者_运维问答Dictionary<string,<Dictionary<string, string>>>

Why can't I?

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One too many sets of <>.

What you want is this:

Dictionary<string, Dictionary<string, string>>

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Dictionary<string,Dictionary<string, string>>

2nd parameter is not a generic so to speak

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Try it like this

Dictionary<string, Dictionary<string, string>>

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Dictionary<string,Dictionary<string, string>> 
    = new Dictionary<string,Dictionary<string, string>>();