I am wondering if this is a sane choice of key for a dictionary? What I want to do is use an expression as the key in a dictionary, something like:

    var map3 = new Dictionary<Func<int, bool>, int>();
    map3.Add((x) => x % 2 == 0, 1);
    map3.Add((x) => x % 10 == 0, 2);
    // ...

    var key = map3.Keys.SingleOrDefault(f => f(2));
    // key = (x) => x % 2
    // map3[key] = 1

The idea being this is a cleaner way than having big if-else or switch statements.

Does this make sense? Will it work? Is there an simpler way?

c# dictionary func
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