How do you link together two struct-type variables together in c#?

Question

My question is simple; how can I link together two structs so that modifying one changes the other in c#? Is this even possible due to the nature of structs?

In code, this is what I'm trying to accomplish:

Vector2 a = new Vector2(0.5f, 0.7f);
Vector2 b = a; // This line needs changing
b.X = 1.0f;
Debug.WriteLine(a.X); // should print 1.0f, but actually prints 0.5f.

For context, I'm making a game in MonoGame and need to link sprite positions together, which naturally use the built-in datatype "Vector2", which is a struct.

user_462376 · Answer

Structures are value type, so they are copy-by-value. You can use references, however, which are handy if you want to pass a structure around by reference to parameters, or as return values from class members.

For example:

var a = new ValueTuple("foo", 1);
ref var b = ref a;
        
b.Item2 = 2;
Console.WriteLine(a);

See https://docs.microsoft.com/dotnet/csharp/programming-guide/classes-and-structs/ref-returns for more information.

How do you link together two struct-type variables together in c#?

1 Answers