Taking a look at the DynamicDictionary

The DynamicDictionary is a dynamic type with dictionary-like behaviors, but there is a lot more to it under the covers and it's a big part of what helps Nancy provide a terse syntax in many places. The most obvious place, is in the lambda expression that forms the route action. Any captured values from the request will be put into a DynamicDictionary and passed into the action for the route.

With the DynamicDictionary you are able to access the values using a standard indexer approach or by using the name, of the captured, value just as a normal property. Both produce the same result, it all comes down to personal preference.

Get["/hello/{name}"] = parameters => {
    return "Hello " + parameters.name;
};

Get["/goodbye/{name}"] = parameters => {
    return "Goodbye " + parameters["name"];
};

It is worth noting that if you prefer accessing captured properties via a normal property you must assign the capture group a valid C# identifier (i.e.: one that starts with an alphabetic character).

The stored values can explicitly or implicitly be cast to most of the primitive types and a special property, called HasValue can be checked to determine if a value has been assigned or not. The values also implement the IEquatable<> and IConvertible interfaces.

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