var v = new Vector3DNew(1, 2, 3);

v += new Vector3DNew(4, 5, 6);

Console.WriteLine(v);

var vTraditional = new Vector3D(1, 2, 3);

vTraditional += new Vector3D(4, 5, 6);

Console.WriteLine(vTraditional);

class Vector3D

{

public double X { get; set; }

public double Y { get; set; }

public double Z { get; set; }

public Vector3D(double x, double y, double z)

{

Console.WriteLine("Allocating a vector (traditional)");

X = x;

Y = y;

Z = z;

}

public static Vector3D operator +(Vector3D left, Vector3D right)

{

return new Vector3D(left.X + right.X, left.Y + right.Y, left.Z + right.Z);

}

public override string ToString() => $"({X}, {Y}, {Z})";

}

class Vector3DNew

{

public double X { get; set; }

public double Y { get; set; }

public double Z { get; set; }

public Vector3DNew(double x, double y, double z)

{

Console.WriteLine("Allocating a vector");

X = x;

Y = y;

Z = z;

}

public void operator +=(Vector3DNew v)

{

X += v.X;

Y += v.Y;

Z += v.Z;

}

public override string ToString() => $"({X}, {Y}, {Z})";

}