.NET dictionary with two keys and one value

Question

Is there a dictionary available in .NET that could hold 2 keys and one value. Like

Dictionary(Of TKey, Of TKey, TValue)

I have

Answer 1

If you are using C# 7.0 the best way to do this is to use tuple types and literals:

// Declare
var dict = new Dictionary<(string, long), long>();

// Add
dict.Add(("abc", 345), 111);

// Get
var searchedValue = dict[("abc", 345)];