Vector2D vector1 = new Vector2D(3, 4); Vector2D vector2 = vector1.Clone(); Console.WriteLine(vector1.ToString()); // Output: (3, 4) Console.WriteLine(vector2.ToString()); // Output: (3, 4) vector2.X = 5; Console.WriteLine(vector1.ToString()); // Output: (3, 4) Console.WriteLine(vector2.ToString()); // Output: (5, 4)In this example, we create a new Vector2D object called `vector1` with an X value of 3 and a Y value of 4. We then create a new Vector2D object called `vector2` using the Clone method on `vector1`. We then output the X and Y values of both vectors, which are identical. We then change the X value of `vector2` to 5, which does not affect `vector1`. We then output the X and Y values of both vectors again, showing that `vector1` remained unchanged, while `vector2` now has an X value of 5. The Vector2D class is not part of the C# standard library, so it is likely that it is part of a custom library or package.