That depends on what you are constructing!
If its a reference type instance - a
class - then basically, no: if you don't provide a constructor then the system will create an empty default constructor for you. And a constructor will always be called when you use the
new keyword - and you do that every time you create a reference type instance because that is the only way to get a "fresh" instance.
MyClass mc;
Does not call the MyClass constructor, because it doesn't create an instance of the class, just a variable that can hold a reference to the instance when it is created later.
MyClass mc = new MyClass();
Always calls a constructor as it does create an instance.
If it's a value type - an basic type such as
int,
double,
bool, or a
struct - then you don't need to cretae or call a constructor. Just creating the instance is sufficient:
int i = 42;
MyStruct ms;
These both create value type instances, without calling a constructor. You can call a constructor for a value type by using the
new keyword:
MyStruct ms = new MyStruct();
But you don't have to do it.
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