Is it good programming to set instance in class without using C-tor

Hello!

I have a class definition called MyClass see below.

I create an instance of this class MyClass
I also want this instance to be able to modify the test instance that exist
in this class.

I can make the instance of this class MyClass to be able to access the
instance test in two ways.

I can either pass an instance of this class MyClass in the c-tor and assign
the instance to the test field.

I can also use a set property by calling the property. Here I set an
instance to the test field.
public MyClass Test
{
set {myTest= value;}
}

Now to my question is it bad programming to use the second method which was
to use a property to set the instance test in the object.

A disadvantage to use a C-tor is if I want to add another argument to a
C-tor and this C-tor is called in many different forms I have to change in
many places.

If I instead use the property to set the test instance in the class it is
sufficient to add just a call to the setter property.

public class MyClass
{
private MyClass test;

public MyClass(...)
{

}

public MyClass Test
{
set {myTest= value;}
}
}

//Tony



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