Tuple of 2 Int and contain method in Unity C#

Question

Trying to make a list tuple of two Integers and after that adding something in it. Then comparing if x,y is one of the tuples in list tuple.

List<Tuple<int, int>> monsterPositions;

I instantly get error like this that it doesn't have Tuple:

Assets/TimeMap.cs(20,7): error CS0246: The type or namespace name `Tuple' could not be found. Are you missing an assembly reference?

I found out that I can add inside tuple like this:

monsterPositions.Add(randomX, randomY);

Then the hardest part is how can I compare the x and y in my Tuple list. I am trying to use Contains but I don't know what is wrong with it.

monsterPositions.Contains(Tuple(x, y));

Answer 1

Pulling out @S.Akbari's comment on the question as I almost missed it when looking through:

Unity does not support Tuples.

Still the case in Unity 2017.3.1f1.

Other observations:

• You can use Vector2 or Vector2Int (and the other numbers) if you're just storing floats and ints.
• I noticed that UniRx has Tuple support, if you're using that o.O
• Best follow @Jon Skeet's advice and make your own class or struct otherwise, or like he mentioned, to implement equality if necessary.

Answer 2

Change the player settings "API compatibility level" to ".NET 4.x":

Answer 3

This is an ancient post, but in aid of those who may stumble upon it, as of 2020 Unity C# supports built-in tuple construction in a new way.

If you don't need the small overhead of Vector2Int, you can use the following declaration:

private (int,int) monsterPositions = (randomX,randomY); //assuming <T>randomX,Y == int

These int tuples can be stored as coordinate pairs in arrays or hashSets, and can be accessed with simple search or .Contains functions