C# constructors overloading

Question

How I can use constructors in C# like this:

public Point2D(double x, double y)
{
    // ... Contracts ...

    X = x;
    Y = y;
}

public Point2D(Point2D po         


        

Answer 1

You can factor out your common logic to a private method, for example called Initialize that gets called from both constructors.

Due to the fact that you want to perform argument validation you cannot resort to constructor chaining.

Example:

public Point2D(double x, double y)
{
    // Contracts

    Initialize(x, y);
}

public Point2D(Point2D point)
{
    if (point == null)
        throw new ArgumentNullException("point");

    // Contracts

    Initialize(point.X, point.Y);
}

private void Initialize(double x, double y)
{
    X = x;
    Y = y;
}