Key value pairs in C# Params

Question

I'm looking for a way to have a function such as:

myFunction({"Key", value}, {"Key2", value});

I'm sure there's something with anonymous types that would be pretty easy, but I'm not seeing it.

The only solution I can think of is to have a params KeyValuePair[] pairs parameter, but that ends up being something similar to:

myFunction(new KeyValuePair("Key", value),
           new KeyValuePair("Key2", value));

Which is, admittedly, much uglier.

EDIT:

To clarify, I'm writing a Message class to pass between 2 different systems. It contains a ushort specifying the the Message Type, and a dictionary of string to object for "Data" associated with the message. I'd like to be able to pass all this information in the constructor, so I am able to do this:

Agent.SendMessage(new Message(MessageTypes.SomethingHappened, "A", x, "B", y, "C", z));

or similar syntax.

user_12643981 · Answer

So I'm new and can't currently add comments, but this is just a suggestion to improve @Bryan Watts's idea of the Pairing.of class by making it generic, allowing it to be easily used by other classes.

public class Pairing 
{
    public static KeyValuePair of(TKey key, TValue value)
    {
        return new KeyValuePair(key, value);
    }
}

Key value pairs in C# Params

12 Answers