Constructor OverLoading in Console apps

class CACOverLoading
{
int x;
public CACOverLoading()
{
Console.WriteLine("Default constructor");
x = 123;
}
public CACOverLoading(int x)
{
Console.WriteLine("Parameterized constructor");
Console.WriteLine(x);
this.x = 789;
}
public void display()
{
Console.WriteLine(x);
}
public static void Main()
{
CACOverLoading col = new CACOverLoading();
col.display();
CACOverLoading col1 = new CACOverLoading(456);
col1.display();
Console.ReadLine();
}
}