Why does Generic class signature requires specifying new() if type T needs instantiation ?
- by this. __curious_geek
I'm writing a Generic class as following.
public class Foo<T> :
where T : Bar, new()
{
public void MethodInFoo()
{
T _t = new T();
}
}
As you can see the object(_t) of type T is instantiated at run-time. To support instantiation of generic type T, language forces me to put new() in the class signature. I'd agree to this if Bar is an abstract class but why does it need to be so if Bar standard non-abstract class with public parameter-less constructor.
compiler prompts following message if new() is not found.
Cannot create an instance of the variable type 'T' because it does not have the new() constraint
