hk1ll3r

// declare and assign
(float x, float y) = GetPosition();

// just assign
float x, y; // declare variables elsewhere
(x, y) = GetPosition();

// tuple usage (explicit)
ValueTuple<float, float> ret = GetPosition();
float x = ret.Item1, y = ret.Item2;

hk1ll3r

  float x, y;

  public ValueTuple<float, float> GetPosition() {
    return ValueTuple.Create(_x, _y);
  }
  
  // Is exactly the same as GetPosition above
  public (float, float) GetPositionAlternateSyntax() {
    return (_x, _y);
  }

hk1ll3r

using System;

public struct Vector2 {
    public float x;
    public float y;
    public Vector2(float x, float y) {
        this.x = x;
        this.y = y;
    }
}