How to use int array as dictionary key C# [duplicate]

Question

I was trying to make a dictionary but as a key it would use pair of integers.

public Dictionary<int[], car> listOfCells = new Dictionary<int[], car>();

but when i check if there is a value it always returns false

return listOfCells.ContainsKey(new int[] { x, y })

you should create dictionary in such a way public Dictionary<int, int[]> listOfCells = new Dictionary<int, int[]>(); where key will be some unique identifier for the car — Vivek Nuna
– Vivek Nuna, Commented Feb 27, 2021 at 8:11

Heinzi · Accepted Answer · 2021-02-27 08:15:17Z

Arrays are reference types. Thus, two arrays having the same contents have two different object identities and are not "equal".

If all your arrays have a constant number of elements (for example, if you use the array to store 2D coordinates), consider using a value tuple instead:

public Dictionary<(int, int), car> listOfCells = new Dictionary<(int, int), car>();

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