Some types include a Deconstruct method that deconstructs its properties into discrete variables. When a Deconstruct method is accessible, you can use positional patterns to inspect properties of the object and use those properties for a pattern. Consider the following Point class that includes a Deconstruct method to create discrete variables for X and Y:
public class Point
{
public int X { get; }
public int Y { get; }
public Point(int x, int y) => (X, Y) = (x, y);
public void Deconstruct(out int x, out int y) =>
(x, y) = (X, Y);
}
Additionally, consider the following enum that represents various positions of a quadrant:
public enum Quadrant
{
Unknown,
Origin,
One,
Two,
Three,
Four,
OnBorder
}
he following method uses the positional pattern to extract the values of x and y. Then, it uses a when clause to determine the Quadrant of the point:
